101results about How to "Eliminate precipitation" patented technology

A hot-rolled austenitic manganese steel strip having a chemical composition in percent by weight of 0.4%≦C≦1.2%, 12.0%≦Mn≦25.0%, P≧0.01% and Al≦0.05% has a product of elongation at break in % and tensile strength in MPa of above 65,000 MPa %, in particular above 70,000 MPa %. A cold-rolled austenitic manganese steel strip having the same chemical composition achieves a product of elongation at break in % and tensile strength in MPa of above 75,000 MPa %, in particular above 80,000 MPa %.

The invention provides a method that takes fresh tea leaves as raw materials to process instant tea powder, which can prevent loss and deterioration of nutrition substance when in the tea manufacturing process. The technique is that: when the raw material is extracted, pectinase is added to enhance extraction rate of the tea leaves and to extract solid substance from solution after the processes of extracting, enzymatic hydrolysis, filtration, condensation and drying, etc. of the raw materials; then tannase is added for enzymatic hydrolysis, so as to resolve the deposition problem of the tea soup and to reduce the bitterness of the instant tea powder and improve the dissolution ability of the tea powder in cold water. The technologies of membrane separation and condensation are adopted in filtration and condensation process; and spray drying or vacuum freeze drying is adopted in drying process; therefore, the whole production process is carried out at relatively low temperature, which maximally preserves the nutrition substances and flavor substances, and the produced instant tea powder is abundant in nutrition and has fresh and soft taste.

The invention relates to an environment-friendly water-based double-component polyurethane floor coating. A component I is water-based aliphatic isocyanate containing 100% by mass of solid content, a component II comprises the following components by weight parts: 10-18 parts of water, 4-10 parts of modified polymeric dispersant, 0.1-0.3 parts of non-ionic and / or anionic wetting agent, 2-20 parts of pigment, 3-15 parts of filler, 40-70 parts of acrylic hydroxyl emulsion, 3-6 parts of functional resin, 0.1-0.5 parts of polyether modified siloxane defoamer, 0.1-0.3 parts of polyether modified siloxane flatting agent, 0.1-0.3 parts of heterocyclic fungicide and 0.2-1.0 part of solvent-free polyurethane thickening agent. When the floor coating is used, the component I and the component II are mixed according to the mass ratio of the component I to the component II being 1:(5-6). According to the coating, all the performances of the coating completely meet the requirements of solvent-based floor coating, the artificial aging resistance is excellent, and the volatile organic compound content in the water-based double-component polyurethane floor coating is obviously lower than that of single-component water-based polyurethane floor coating, and the environmental requirement is met.

A processing method of sheep placenta instant powder comprises the following steps: 1) cleaning up sheep placenta, taking the cleaned sheep placenta out and draining, and putting the sheep placenta into a fresh-keeping storehouse; 2) taking the sheep placenta out of the fresh-keeping storehouse, putting the sheep placenta into warm water and immersing for 10 min, taking out the sheep placenta and tumbling by sending the sheep placenta into a tumbler; 3) taking the sheep placenta out and putting it into a stainless steel tank, adding water into the stainless steel heating tank, sealing the stainless steel heating tank, heating to 75-80 DEG C, and keeping for 15-18 min; 4) crushing the sheep placenta by putting the sheep placenta into a meat mincer; 5) refrigerating the minced sheep placenta for 3-8 h, and carrying out intermittent microwave processing; 6) adding the minced sheep placenta which has undergone the microwave processing into purified water, heating to 45 DEG C, adding xylanase, uniformly stirring, keeping the temperature at 45-60 DEG C, and carrying out extraction for 2-4 h so as to obtain an extracting solution; and 7) heating the extracting solution to 100 DEG C, keeping for 30 min, carrying out vacuum filtration to obtain a suction filtration treated feed liquid, spray-drying the feed liquid, collecting a dried product, and crushing until there is no large agglomerates, so as to obtain the sheep placenta instant powder.

The invention relates to the field of health food and particularly relates to raw materials of a health preserving white spirit, a dendrobium health preserving white spirit and a manufacturing method thereof. The raw materials of the health preserving liquor are characterized by comprising the following components in parts by weight: 1-3 parts of dendrobium, 1-3 parts of rhizoma polygonatum and 1-2 parts of medlar. According to the invention, three types of medicine food homology plant raw materials are reasonably collated to serve as the raw materials of the health preserving white spirit for developing dendrobium nectar, and the dendrobium health preserving white spirit provided by the invention is higher in market value; and meanwhile, the preparation process disclosed by the invention is a combination of a modern food new technology and the traditional method, a multilevel coupling clarification technology is adopted, and a chemical clarification technology and an ultrafiltration clarification technology are jointly applied to the production of white spirit products, thus the precipitation can be effectively eliminated, the product quality can be ensured and the technical problem existing in the liquor production in the prior art can be better solved.

The present invention provides one kind of long service life module for aluminum alloy pressure casting die. The material for the module has the components including C 0.37-0.45 wt%, Si 0.90-1.40 wt%, Mn 0.30-0.60 wt%, Cr 5.10-5.70 wt%, V 1.00-1.40 wt%, Mo 1.20-1.50 wt%, S 0.0005-0.003 wt%, P 0.001-0.015 wt%, and Fe and inevitable impurities for the rest. The module is produced through the following steps: homogenizing electroslag ingot in a heating furnace at 1230-1290 deg.c for 15-20 hr, twice upsetting and stretching in the initial forging temperature of 1230-1250 deg.c and final forging temperature of 850-900 deg.c, and structure fining treatment of the hot forging in an annealing furnace at 860-950 deg.c. The module has over 3.5 times longer service life compared with that of available technology.

A liquid fertilizer is prepared from urea and / or hydrolytic amino acid, potassium hydroxide, copper sulfate, iron sulfate, zinc sulfate, magnesium sulfate, manganese sulfate, calcium hydroxide, ammonium molybdate, cobalt chloride, borax, VC, acetyl salicylic acid and water through proportioning, liquefying and chelating reaction. Its advantages are low cost, high fertility and wide application range.

The present invention relates to one kind of slurry paper for no-mercury Zn-Mn cell with polymer electrolyte. The slurry paper includes base paper and slurry, and the slurry consists of one kind of polymer gel prepared with coordination ion liquid and organic mercury-replacing buffer liquid. The coordination ion liquid is prepared with urea, thiourea, zinc chloride and ammonium chloride; and the polymer gel is prepared with coordination ion liquid, PVA, PAM, PEG and crosslinking starch in certain proportion. The no-mercury Zn-Mn cell with polymer electrolyte can decrease the internal resistance of cell, improve dynamic discharge performance of cell, prolong the maintenance time and avoid environmental pollution caused by mercury.

The invention relates to a mortar vehicle for concrete and asphalt, comprising a bottom disc and upper components arranged on the bottom disc; the upper components comprise an assembly for weighing and charging dry powder, an assembly for measuring and charging asphalt, an assembly for measuring and charging water, an assembly for measuring and charging additives, an assembly for measuring and charging P emulsion, an assembly for a stirring main machine, an assembly for a mortar grouting plate, a power system and a control system; the two sides of a dry powder delivery screw machine in the assembly for weighing and charging dry powder are provided with a first asphalt storing tank and a second asphalt storing tank; the two sides below a dry powder storage bin are respectively provided with a third asphalt storing tank and a P emulsion storing tank in the assembly for measuring and charging P emulsion; three asphalt storing tanks are communicated to form an asphalt storing tank in the assembly for measuring and charging asphalt; and a water tank and a water pump in the assembly for measuring and charging water and an air reservoir in the power system are fixed on the bottom disc below the upper components. The mortar vehicle has the advantages of compact structure, ingenious layout, accurate measurement and wide application range and the like, can produce mortar with high modulus of elasticity and also can produce mortar with low modulus of elasticity.

The invention provides a pure-natural hangover-alleviating tea and a preparation method thereof. The tea comprises the following raw materials by weight percent: 40 to 45 % of pueraria flower, 3 to 8 % of cassia seed, 10 to 15 % of dried orange peel and 35 to 40 % of tea, and the tea is prepared by mixing, cleaning, drying, crushing, sieving, sterilizing and filling into bags. The hangover-alleviating tea prepared by invention is extracted from pure natural plants, has unique dual effects of inhibiting alcohol absorption and accelerating alcohol excretion, can eliminate sediment of residual alcohol in liver and stomach and thus can alleviate hangover, protect liver, strengthen stomach and preserve health, and is convenient to carry.

The invention provides a skin-whitening toner containing earthworm extracting solution. The skin-whitening toner is characterized by being prepared from the following components by weight: 1.5-2.5 g of rhizoma smilacis glabrae extract, 4-6 g of wax gourd powder, 55-65 g of the earthworm extracting solution, 2-4 g of uronic acid, 1.5-2.5 g of an emulsifier, 1.5-2.5 g of a humectant, 1.5-2.5 g of white grape wine, 2-4 g of rhizoma dioscoreae juice, 4-6 g of radix sophorae flavescentis gel, 0.5-1.5 g of glycerol, 1.5-2.5 g of Vaseline, 2-4 g of lotus root starch, 0.4-0.6 g of protein zinc, 1.5-2.5 g of esterifying enzyme compound bacteria solution, and 30-50 g of purified water. The skin-whitening toner contains polypeptide, amino acid, protein, lumbricin, vitamin and various microelements, has the obvious antioxidant activity, can effectively promote the growth and proliferation of human skin fibroblasts, and promote the synthesis of the matrix such as collagen, and finally, the purposes of whitening the skin and resisting ageing are achieved.

The invention discloses an aluminum-plated steel plate with tensile strength of 1800 MPa, a manufacturing method thereof and a hot forming part. The aluminum-plated steel plate comprises a base plateand a plating layer; the base plate comprises the following chemical components including, by weight, 0.25%-0.35% of C, 1.0%-1.5% of Si, 0.8%-3.0% of Mn, less than or equal to 0.05% of P, less than orequal to 0.05% of S, less than or equal to 0.10% of Al, 0-1.0% of Cr, less than or equal to 0.05% of Mo, less than or equal to 0.01% of N, 0.05%-0.10% of the sum of Nb and V and the balance Fe and unavoidable impurities; a plating solution for forming the plating layer comprises 3.0%-6.0% of Si, 0.5%-2.5% of any one or more of Sn, Cu and Mo and the balance Al and inevitable impurities; the steelplate is applied to manufacturing the hot forming part, after materials are subjected to hot forming, the performance requirement that the tensile strength is larger than or equal to 1800 MPa is met,and the excellent comprehensive mechanical property is achieved; and when the steel plate is used for hot forming part, the uneven appearance formed after electrophoresis of a traditional aluminum-silicon steel plate can be eliminated, and the adhesive force and the corrosion resistance after electrophoretic coating are improved.

The invention provides an extracting device for hydrophobic dissolution humic acid in a fresh water body. The device comprises a raw water supply unit, a preprocessing unit, a reverse osmosis concentration unit, a pH value regulating unit, an organic matter extraction unit, a first water tank, a master control system, a second water tank, an automatic pH value regulating unit and a humic acid extracting unit, wherein the automatic pH value regulating unit comprises a pH sensor, a second dosing device, a third dosing device and a metering dosing pump; both the pH value regulating unit and the automatic pH value regulating unit are full automatic, so that labor force is saved, the production cost is lowered, and the pH value regulating accuracy is high; according to the humic acid extracting unit, humic acid and other dissolved organic matter are separated through filtering of a filter membrane, and due to leaching and purifying of a leaching device, the purity of humic acid is improved. The extracting device for hydrophobic dissolution humic acid in the fresh water body is simple in structure, high in automation degree and convenient to operate.

The invention belongs to the field of microbial electrochemistry, and discloses a method for in-situ recovery of high-purity struvite through a microbial electrolytic cell. The method comprises the steps that at least one of phosphorus-containing wastewater and phosphorus-containing sludge is added into the microbial electrolytic cell after microbial acclimation, an external voltage is applied tocarry out a microbial electrolysis reaction for a period of time, and then struvite sediment can be separated out, wherein the external voltage is smaller than the electrolytic voltage of water. According to the method, a microbial electrolytic cell (MEC) technology is utilized, and micro-voltage less than that of electrolytic water is adopted so that the problems that the time for obtaining the struvite through ectopic crystallization is long, the purity is low, particles are small and the sedimentation and separation performance is poor can be effectively solved, and the electric energy consumption is greatly reduced. Moreover, the method is based on an in-situ reaction, on the premise that stirring is not needed, the nucleation rate of struvite crystals is increased, the growth rate ofthe struvite crystals is increased, the limit of the growth of the struvite crystals is broken through, the particle size of the struvite is increased, the purity of the struvite is improved, and in-situ crystallization recovery of the high-purity struvite is achieved.

Disclosed is a process for any productions that involve reacting or mixing two or more substances to form one or more new substances under low supersaturation. However, the specific process used to exemplify the present invention is the “wet process” phosphoric acid production, in which this process is achieved through dissolving the phosphate ore and dispersing the sulfuric acid separately and simultaneously with the gypsum slurry that has roughly stoichiometrically balanced calcium and sulfate ions in the solution and is also at considerably low supersaturation. The slurry carried out digesting the phosphate ore and the slurry accomplished dispersing the sulfuric acid then mix together to form the said gypsum slurry that has roughly stoichiometrically balanced calcium and sulfate ions in the solution and is also at considerably low supersaturation. The slurry for filtration is drawn from the sulfuric acid dispersion compartment, and the sulfate level for this slurry is maintained suitable for the product separation.

The invention provides methods that employ derivatives of 2-cyano-6-hydroxy- or 2-cyano-6-amino-benzothiazole, for example, in a bioluminogenic reaction. Also provided are novel compounds that can be used in the methods. The invention further provides methods for detecting or determining the presence of molecules and / or enzymes, the modulator activity of such molecules, and / or the activity of such enzymes. The methods are adaptable to high-throughput format.

The invention provides a vertically-movable furnace at a short temperature zone. The heating furnace only adopts a control system with an iron-chromium-aluminium electric heating wire and a thermoelectric couple, so that a furnace body is simple in structure and low in cost; the vertical height of a heating zone is easy in control, and a heating furnace at the short temperature zone is formed; in addition, since the furnace body is provided with openings at the top part and the bottom part, under the convection action of air, the temperature distribution of the heating zone in the vertical direction takes on a trend of gradual reduction from the middle to the upper side and the lower side so as to be beneficial to reducing the length of a melting zone, improving the zone refining effect of raw materials and reducing the content of impurities in crystals. Furthermore, a silicon carbide material is selected for a support of the heating furnace for supporting a quartz crucible, and the release of latent heat of crystallization on crystal growth interfaces is greatly promoted by utilizing high heat conductivity of silicon carbide, so that a micro-convex solid-liquid interface beneficial to single-crystal growth is obtained. CdTe crystal is grown by utilizing the heating furnace, so that the benefit for eliminating defects of Te precipitation, inclusion and crystal twinning and the like is achieved and the utilization rate of the CdTe single crystal is increased.

The invention discloses a phase transition heat storage film. The phase transition heat storage film comprises a lower rubber film, a heat storage functional layer, and an upper rubber film which arelaminated successively; the lower surface of the upper rubber film, and the lower surface of the lower rubber film are coated with pressure sensitive adhesive layers; the heat storage functional layercomprises matrix resin, and phase transition microcapsules distributed in the matrix resin; the matrix resin is a thermoplastic resin or a thermosetting resin. The invention also discloses a preparation method of the phase transition heat storage film. According to the phase transition heat storage film, defects in the prior art that in phase transition circulation of conventional phase transition heat storage film, phase transition material precipitate and leakage are caused; and phase transition heat storage sheet material terminal application stability is improved.

The invention discloses an anti-explosion accumulator power supply unit comprising an upper box body, a lower box body, a box cover, a plurality of locking devices and a plurality of connecting rods. A dehydrogenation work bolt arranged on each lead-acid accumulator comprises a shell, a top cover, an air filter cup seat, an air filter cup, a first air filter sheet and a second air filter sheet. A gap is arranged between the outer wall of the air filter cup seat and the inner wall of a lower shell, dehydrogenation elements are internally arranged in the air filter cup, and the top cover is provided with another gap. The anti-explosion accumulator power supply unit has the advantage of reducing the usage space by utilizing a double-layer structure. The locking devices play the role of connecting, locating and fixing the upper box body and the lower box body, are convenient for the double-layer box body to be lifted synchronously or respectively; therefore, the anti-explosion accumulator power supply unit is convenient to use and is more suitable for underground emergency ventilation and charging rooms. Because the dehydrogenation work bolt is utilized, the hydrogen exhaust is reduced even eliminated, the leakage of water fog is completely avoided, and the use safety of the power supply unit is improved. The anti-explosion accumulator power supply unit can not only be taken as a traction power supply, but also taken as a fixed emergency power supply.

The invention discloses a method and device for improving concentration stability of calcium chloride solutions used for sintering ore. The device comprises a calcium chloride mother solution pool, calcium chloride solution pools and spraying devices. The calcium chloride mother solution pool is communicated with the calcium chloride solution pools through a pump, and the spraying devices are arranged on a material supplying flow line behind a number three sintering ore finished product bin and a number four sintering ore finished product bin and communicated with the calcium chloride solution pools through spraying pumps, and stirring pumps are arranged on the calcium chloride mother solution pool and / or the calcium chloride solution pools, and the corresponding stirring pumps are started to stir when liquid in the calcium chloride mother solution pool and / or the calcium chloride solution pools are pumped. Due to the facts that the spraying devices are arranged on the material supplying flow line of the number three sintering ore and the number four sintering ore, the stirring pumps are arranged on the calcium chloride mother solution pool and / or the calcium chloride solution pools, and stirring is performed before the calcium chloride mother solutions and / or calcium chloride solutions are pumped and in the process of pumping the calcium chloride mother solutions and / or calcium chloride solutions, the problem of calcium chloride precipitation is solved, the concentration stability of the calcium chloride solutions is improved, and meanwhile resource loss and environment pollution caused by discharging of calcium chloride are eradicated.

The invention discloses sobering-up tea and a preparation method thereof, wherein the sobering-up tea comprises the following raw materials in parts by weight: 10-15 parts of roselle, 10-15 parts of flos pueraria omeiensis, 15-20 parts of penthorum chinense pursh, 5-10 parts of fructus schisandrae chinensis, 5-10 parts of oroxylum indicum, 15-20 parts of calendula officinalis, 10-15 parts of persimmon leaves, 16-22 parts of small red bean flowers, 12-18 parts of verbena officinalis, 8-14 parts of orange peel, 10-15 parts of mung bean flowers, 7-13 parts of shaddock peel, 5-10 parts of rhizoma imperatae, 15-20 parts of broad bean leaves, and 10-15 parts of alpinia katsumadai. The sobering-up tea has double efficacies of inhibiting alcohol absorption and accelerating alcohol excretion, eliminates precipitation of residual alcohol in the liver and the stomach, achieves the sobering-up, liver-protecting and stomach-nourishing purposes, has a quite significant effect of relieving or neutralizing alcohol effects, can quickly eliminate all appearing discomfortableness due to alcohol drinking, effectively prevents drunkenness, and has the advantages of no stimulation, no adverse reaction, safety, reliability, easily available raw materials, and low cost.

The invention discloses a method for detecting the total Cr content in a chromate solution which contains zinc sulfate, which comprises the following steps of oxidation, color development, determination and so on in the prior art, and is characterized in that the influence of the zinc sulfate on detection of the total Cr content in the chromate solution is eliminated through two steps, namely precipitation and separation after the chromate solution which contains the zinc sulfate undergoes oxidation, and then color development and determination are performed. The detection method solves the problem that the Cr testing result is greatly influenced by the zinc sulfate in the chromate solution through addition of the two steps, namely the precipitation and the separation, thereby avoiding reduction of the Cr testing result, improving the accuracy of the testing result and making the testing result reach more than 90 percent of the nominal value.

The invention discloses a multi-pass continuous drawing method for a medical stainless steel ultrafine wire. The method comprises the following steps that (1) a stainless steel fine wire blank of phi0.8mm is subjected to coating treatment; (2) the stainless steel fine wire blank subjected to coating treatment in the step (1) is subjected to primary cold drawing, and a stainless steel ultrafine wire is obtained; (3) the stainless steel ultrafine wire in the step (2) is subjected to online coating removal treatment and online solid solution treatment; and (4) the stainless steel ultrafine wiresubjected to online coating removal treatment and online solid solution treatment in the step (3) is subjected to secondary cold drawing and online oil removal treatment, and the medical stainless steel ultrafine wire with a bright surface is obtained. The obtained medical stainless steel ultrafine wire has the advantages of being high in strength, good in toughness and good in corrosion resistance, sizes are uniform, deviation is small, the surface brightness is high, the bright surface with metal luster is shown, the requirements of the medical stainless steel ultrafine wire are completely met, production efficiency is high, and the medical stainless steel ultrafine wire is suitable for large-scale production.

Processes for producing low nitrogen, essentially nitride-free chromium or chromium plus niobium-containing nickel-based alloys include charging elements or compounds which do not dissolve appreciable amounts of nitrogen in the molten state to a refractory crucible within a vacuum induction furnace, melting said elements or compounds therein under reduced pressure, and effecting heterogeneous carbon-based bubble nucleation in a controlled manner. The processes also include, upon cessation of bubble formation, adding low nitrogen chromium or a low nitrogen chromium-containing master alloy with a nitrogen content of below 10 ppm to the melt, melting and distributing said added chromium or chromium-containing master alloy throughout the melt, bringing the resulting combined melt to a temperature and surrounding pressure to permit tapping, and tapping the resulting melt, directly or indirectly, to a metallic mold and allowing the melt to solidify and cool under reduced pressure.

The invention relates to silicon carbide-hypereutectic silicon aluminum alloy composite material powder. Through adjusting the addition amount of silicon carbide and silicon, the wear resistance, thethermal conductivity, the specific heat capacity, a coefficient of thermal expansion and the strength of the composite material powder can adapt to different sliding / friction mating material, the abrasion is reduced, and the mechanical efficiency is improved. According to a preparation method of the composite material powder provided by the invention, raw material components are combined, a quickchilling spray powder producing process is adopted under an inert atmosphere condition, the size of a primary silicon grain size of the prepared composite material alloy powder is smaller than 10mu m,the prepared composite material alloy powder contains SiC micro grains with the size being 1 to 20mu m, and the alloy powder is quick chilled under the inert atmosphere, so that the oxygen content ofthe alloy powder is reduced, a composite material powder product shows low oxygen content, and a comprehensive mechanical performance and the wear resistance of the product are improved. In addition,the product conforms to a light-weight and miniaturized parts development trend, and has an excellent heat conduction and heat radiation performances, the mechanical efficiency is greatly improved, and the service life is prolonged.

A liquid droplet discharging apparatus includes an ink tank configured to retain ink, a head configured to discharge the ink, an ink supply path configured to supply the ink from the ink tank to the head, and a shape changing section configured to change a shape of the ink supply path such that differences in elevation are formed in a direction of gravity in the ink supply path.

The invention discloses healthcare herba dendrobii baijiu with a function of liver protection. The healthcare herba dendrobii baijiu is characterized by being prepared from, by weight, 80-120 parts of baijiu base liquor, 0.2-4 parts of herba dendrobii, 0.2-4 parts of radix puerariae, 0.2-4 parts of toona sinensis leaves, 0.2-1 part of semen trichosanthis, 0.2-1 part of herba gynostemmatis pentaphylli, 0.2-1 part of sorghum roots, 0.2-1 part of radix glycyrrhizae, 0.2-1 part of flos ginseng, 0.1-0.5 part of puberulous glochidion herb, 0.1-0.5 part of radix aristolochiae, 0.2-1 part of olives, 0.2-1 part of banana skin, 0.2-1 part of herba cistanche, 0.2-1 part of herba cynomorii, 0.1-0.5 part of radix angelicae, 0.1-0.5 part of flos caryophyllata, 0.2-1 part of buddleja davidii and 0.1-0.5 part of radix angelicae sinensis. By improvement of a traditional process and special pharmaceutical preparation, the baijiu integrates nutrition and healthcare functions, and improvement of body immunity and liver protection can be realized after long-term drinking of the healthcare herba dendrobii baijiu. In addition, consumers can enjoy the baijiu to experience natural healthy nourishing while physical health is achieved.

A method of creating a smooth-to-the-touch Terrazzo pool finish is disclosed. A mixture of 1 part cement to 1-2 parts crushed marble aggregate, ¼ part pool sand, and sufficient potable water, is mixed until smooth and creamy in texture. The mixture is pumped to the gunite shell of a pool interior surface and hand trowelled onto the shell. In a still soft state, the trowelled surface is seeded with colored and / or high performance aggregate to create desired surface effects. The seeded elements are then trowelled into the upper layers of the surface until hard. After an initial set has taken, the surface is sprayed with a chemical retarder. Once fully set, following 10-20 hours of curing, the mixture surface is power-washed and diamond sanded until smooth-to-the-touch and acceptable in appearance in terms of exposing the previously seeded surface effects. The pool is then filled, chemically treated, and brushed until the surface is no longer dust producing.