Blue permanent ink developed for documentary use. Tested to ISO 12757-2 standard, being waterproof, lightfast, smudge-resistant, non-erasable and resistant to ethanol, hydrochloric acid, ammonia, bleach and most other chemicals.
by congo
Blue permanent ink developed for documentary use. Tested to ISO 12757-2 standard, being waterproof, lightfast, smudge-resistant, non-erasable and resistant to ethanol, hydrochloric acid, ammonia, bleach and most other chemicals.