Service: Condensed chemical resistance for keyboards covered with film

Chemical resistance according to DIN 42115
In a departure from DIN 42115, the reaction time was extended to a period of 24 h. The assessment took place directly after chemical residue was removed and was then repeated after 24 h.


	Substance	CAS-Number*	Resistance
Organic solvents	Acetone	67-64-1	Resistant with some restrictions
	Ethanol	64-17-5	Resistant with some restrictions
	Isopropanol	67-63-0	Resistant with some restrictions
	Loesol 80 (90-100% hydrocarbons, naphta)	64742-49-0	Resistant with some restrictions
	Methyl-ethyl-keton	78-93-3	Resistant with some restrictions
	White spirit	N/A	Resistant

Inorganic solvents	Cellulose thinner	N/A	Resistant with some restrictions
	Screen cleaner	N/A	Resistant with some restrictions
	Thinning agent	N/A	Resistant with some restrictions

Acids	Acetic acid 5%	64-19-7	Resistant
	Phosphoric acid 10%	7664-38-2	Resistant with some restrictions
	Sulphuric acid 10%	7664-93-9	Resistant with some restrictions

Other substances and mixtures	Ammonia	7664-41-7	tba
	Vinegar-based cleaner; ingredients/100g <5% anionic tensides	N/A	Resistant
	Machine oils	N/A	tba
	Potash	584-08-7	Resistant
	Sweat	N/A	tba
	Soda	N/A	tba
	Hydrogen peroxide 12%	7722-84-1	Resistant with some restrictions

LABS test	White spirit: cellulose thinner: methyl-ethyl-ketone	N/A	tba

* Chemical Abstracts Service Registry Number, see www.cas.org

"Resistant"	No change after exposure to the chemical

"Resistant with some restrictions"	Slight, insignificant changes after exposure to the chemical without any impairment of functions

"Non-resistant"	A significant change after exposure to the chemical with or without impairment of funtions