Stain Resistance

A sample from an area with as many different printed colors as possible, as well as the ground, is exposed to the following reagents: (1) Distilled water, 65 to 75°F; (2) Distilled water, 115 to 125°F; (3) Ethyl alcohol; (4) Vinegar, 3 % acetic; (5) Alkali solution; (6) Hydrochloride, 5 %; (7) Soap solution; (8) Detergent solution; (9) Pure orange juice; (10) Butter; (11) Catsup; and (12) Tea. Immediately after application, the reagent is covered with a watch glass and allowed to stand for a period of 24 hours. After removal of the watch glass, the wall covering is cleaned using, as appropriate, hot or cold distilled water, 50 % ethyl alcohol, or with the specified detergent solution. The specimen shall show no evidence of appreciable change to the decorative surface.