Ski Builders Forum

hello All

I am writing because I need some advises
I have some problem with rectifying my bases, the problem is I am using black base material with graphite on it and doing some die-cut graphics with white, Grey and red material, and when I rectify the base material with a smooth sand paper, the white base material gets dirty like the photo shows… this problem is caused by the sand paper?? How could I prevent it?? Buy a new sand paper. This effect was caused by a 120grade sand paper…

I hope you have some ideas..

Best regards

Buying some new sandpaper seems like a logical first step. It could be your sandpaper is cross-contaminating between your dark base materials and your lighter ones. Though it might also be the sandpaper itself? I think the first step is to try with some brand new sandpaper.

but what number should i buy??? its not easy buy small quantities of this sand paper...

would a wet sander or stone grind get rid of that?

i use a snowboard rectify machine , from r off b and i use water... maybe the stone will be a solution but regarding my erlier jobs were perfect, i beleive is because the sand paper...

I actually think that is the graphite from the black material. I don't think it's a good idea to mix the black with graphite with the other two colors. The different materials will respond differently. The graphite additive is supposed to make the base material faster. So the black part of your base faster than the other parts of the base? If you switch to a black base without the graphite additive you also won't see the bits of graphite in your other colors.

but also you can see some red fragments... i share your idea but the red contamination also get my head spining around..

maybe the graphite is picking up red material and depositing that also? Hmm... didn't notice the red at first.

you think a stone grind will make that disappear?

matbe yes... maybe not...