Oily PU adhesive added 3% 5% RN or 1001 RN hardener, stir 2 to 3 minutes.

Common problem:

Film to all new soles to the shoes (degumming)

Possible reasons:

Cow leather, PU coated leather polishing rough enough

Leather polished enough

Artificial leather surface not treating agent or wrong treatment

Treatment did not work

The solution:

For leather, PU coated leather, try to grind the deep. The best everywhere white fluff

Leather to grind the uniform