Collins' Permanent ink tests

For the tests below, the original ink sheet is on the left and the sheet subjected to water is on the right. Each sheet were subjected to at least 2 rounds of running water for 20 seconds each.

Permanent ink test on Rhodia paper

Permanent ink test on Tomoe River paper

Sailor Storia ink test on Rhodia paper

Sailor Storia ink tests on Tomoe River paper

Waterproof and non-waterproof ink test