Small lab set up for liquid paint testing

A small laboratory set up is required for any paint shop floor. By testing the liquid paints one can reduce rejections to the maximum level.

A table with granite top is ideal for paint testing.

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Glass plates are need for testing the flow of any liquid paint.

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Set of graduated glass beakers

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Palette knives for opening and mixing liquid paints. Make sure that they are made of stainless steel.

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One can also use polypropylene measuring cups. Make sure the solvent does not affect the cup.

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Measuring jars

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Hydrometer to mesure specific gravity of paints and thinners

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Viscosity measuring Ford cup B4

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Thermometer

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Whatman filter paper

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A stop clock

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Graduated polypropylene mugs

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Laboratory hot air oven

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Watch glass

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Glass test tubes

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Weighing scale

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Universal pH paper indicator

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Glass rods

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Testing panels 6″ x 3″ x 0.5 mm -1mm

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Wet film thickness gauge

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Elcometer (dry film thickness gauge)

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Conical mandrel for bend test

Impact resistance tester

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Magnifying lens to check surface defects of coatings

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Specific gravity cups

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Paint opacity checking card

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Cross hatch cellotape

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Cross hatch cutting tool

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Pencil hardness tester

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Paint resistivity meter

Non-ionic Bowl Cleaner formula guideline

Bowl Cleaner

Formulation

#MaterialsWeight %
1.Water67.0
2.78% Phosphoric acid – Industrial grade4.0
3. Non-ionic surfactant*0.5
4.Acid thickener4.0
5.37% Hydrochloric acid solution24.5

Supply viscosity @ 20 deg C = 1750 cps

pH = 1.3

Specific Gravity @ 25 deg C = 1.049

Bulk density @ 25 deg C = 8.74

Suggested surfactant : Sulfonic N 150 (non-ionic)

http://alchemchemical.com/product-details/items/180.html

Lab testing methods for evaluation of a coating

  • Pigment testing as per IS 33
  • Solvent testing as per IS 82
  • Evaluation of paints and pigments
  • Testing plastic and rubber components
  • Salt spray resistance
  • Humidity resistance
  • Accelerated QUV weatherometer test
  • Bend test
  • Impact resistance test
  • Water analysis
  • Acid / alkali / fertilizer / water resistance tests
  • Cross hatch test
  • Glossmeter reading in 20 deg, 45 deg and 80 deg
  • Colour matching computer
  • Pencil hardness test
  • Metal pretreatment bath parameter maintenance
  • Sieve residue analyzer

Powder coating standards

For finishes made with Polyester epoxy powder coat on nano-treated mild steel components. All tests are conducted on panels as recommended in ASTM standards.

# Tests Parameters Test Methods
  Colour L*a*b readings of less than 0.3 under cool white light to RAL Shades Ref. RAL Shade cards
Gloss 60 +/- 10 at 60o at 1.5 mil ASTM D523
Hardness No film cut while gouging with a mechanical pencil using a 2H lead ASTM D3363
Adhesion or cross hatch test No loss of adhesion Class 5B ASTM D3359
Flexibility No cracking or peeling at 1/8” Conical Mandrel ASTM D522
Chemical and Stain Resistance Five drops of each reagent under a watch glass for 4 hours. There shall be no more than a trace of stain. Change in gloss shall not exceed standard. Reagents used: IPA, Nail polish remover, fizzy drinks like coke, Mustard, Tea, Coffee, 5% acetone ASTM D1308
Impact Resistance No peeling or loss of adhesion using adhesion tape. ASTM D2794
Salt Spray Resistance Min. 400 hours, no creeping corrosion ASTM B117
Humidity Resistance No blistering after 200 hours ASTM D2247
  Abrasion Resistance 0.3 g – 0.4 g material loss after 100 cycles of Tabor Abrader ASTM D4060
  Oven Bake Resistance Within the specification of colour, gloss, hardness and adhesion after double bake of one panel ASTM D2454
  UV Resistance Minimal change in colour or gloss after 60 hours using QUV-A bulbs Ref. QUV Weatherometer manual

Emulsion paint formulation guidelines

S. No.Raw materialsQty (kg)
1Soft water21.00
2Sodium hexa meta phosphate0.20
3SPCP0.40
4Anionic dispersing agent0.70
5Nonionic dispersing agent0.40
6Defoamer0.20
7Hydroxy ethyl cellulose0.50
8In-can preservative0.20
9Dry film preservative0.70
10Ammonia0.20
11Diethylene glycol2.20
12Titanium dioxide – anatase18.00
13Calcined china clay5.00
14Talc9.00
15Calcite5.00
16Pure acrylic emulsion35.00
17Defoamer0.10
18Ammonia0.20
19Pine oil1.00
Total100
Approximate rate per kg
Pigment paste for tinting
Machinery
Disper mix
100 G tank
Containers
10 kg, 4 kg, 1 kg