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RESISTANCE TO CHEMICALS ASTM F 925-2002 & ASTM F 1700 -2004 (adapted)

1. TOOLS
1.1 Gloves
1.2 Tweezers
1.3 Medicine dropper, about 8 mm straight glass with rubber bulb or pipette having a point opening diameter 1.6-1.8 mm
1.4 White facial tissue
1.5 Watch glasses
1.6 Timer
1.7 Filter paper
1.8 12 test reagents:

  • White vinegar (5% acetic acid)
  • Rubbing alcohol (70% isopropyl alcohol)
  • White mineral oil (medicinal grade)
  • Sodium hydroxide solution (5% NaOH)
  • Hydrochloric acid solution (5% Hcl)
  • Sulfuric acid solution (5% H2SO4)
  • Household ammonia solution (5% NH4OH)
  • Household bleach (5.25% NaOCl)
  • Olive oil (light)
  • Kerozene (K1)
  • Unleaded gasoline (regular grade)
  • Phenol (5% active phenol)

2. SAMPLING
1*800 mm * plank width (or shorter provided area is sufficient to place all reagents)
Selected samples shall have minimal changes in surface texture, and of a colour to show potential effect of reagent
Identify the positions corresponding to each of the substances (this can be done on the sample proper or on a plastic template)

3. ENVIRONMENTAL CONDITIONS
Condition the specimens and the test reagents for at least 24 h prior to testing. The environment for conditioning and testing is 23(+/-2)℃ and 50(+/-5)% relative humidity

4. TESTING PROCEDURE
4.1 Place the sample face up on a firm flat surface and select a test area on the sample having the flattest area and colour appropriate to show the effect of the reagent and draw a square approximately 38x38 mm centered on that desired test location; then place a piece of filter paper within each test square

4.2 Using a medicine dropper of pipette, deposit 6-8 drops of test reagent or a sufficient amount to thoroughly wet the filter paper. White mineral oil should be applied as a thin layer directly onto the test area

4.3 Place a watch glass cover over each reagent and allow the test reagents to remain in contact with the test area for 60 (+/-1 min)

4.4 Remove watch covers and then the filter papers with tweezers. Blot (do not rub) residual liquid with a dry facial tissue, being careful not to disturb the exposed area more than necessary. In the case of white mineral oil, lightly scrape the sample surface with a spatula and then wipe the area with dry facial tissue

4.5 If residual reagent remains on the surface, lightly clean the exposed area with water or mild solvent, such as isopropanol or odorless mineral spirits, then blot dry with facial tissue
4.6 Within 5 minutes after removing test reagents, visually examine the exposed test area as compared to the adjacent, untested area of similar colour and texture

5. ASSESSING TEST RESULTS
No more than slight change in surface dulling (gloss loss), staining or surface attack (softening, warping, swell, blister, raised or rough areas)



 
  
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