STAIN RESISTANCE － NALFA LF 01-2008-3.4

1. TOOLS
1.1 Concave glass covers 25 mm in diameter
1.2 Overhead lighting
1.3 Nylon bristle brush
1.4 1 Kg mass
1.5 Cellulose sponge
1.6 Clean, soft cloth
1.7 Cotton balls
1.8 Commercially available cleaner with 4% butyl cellosolve (non-abrasive)
1.9 Sodium hypochlorite
1.10 Baking soda
1.11 Water
1.12 Acetone
1.13 15 staining substances (test reagents)

2. SAMPLING
The sample shall have an area sufficient to permit placement of all test reagents on the surface in 2 lines. Individual reagents shall be placed about 50 mm apart but in no circumstances less than 25 mm apart

Samples shall be free from resin wood and features such as bark, knots and resin pockets

3. ENVIRONMENTAL CONDITIONS
Temperature: 23 (+/- 3) ℃
Humidity: 50 (+/-5) %

4. TESTING PROCEDURE
4.1 Use cotton balls or a soft cloth impregnated in a commercial cleaner to wipe the sample surface

4.2 Apply the 15 staining substances on the sample surface and cover them with concave glass covers. Move each glass cover so that the reagent comes in contact with the glass rim and the reagent is both covered and uncovered where the glass sits

4.3 Allow the sample to stand undisturbed for a period of 16 to 24 hours. Then proceed to cleaning the surface with using water, a household cleaning agent, acetone and bleach

4.4 Evaluate the staining resistance level and fill the report

5. ASSESSING TEST RESULTS
Passing requirement per the sales contract