Hi Maxman,
If you breed a spider to a het albino, then you will get spiders and normals. Each will also possibly be a het albino. The problem is there is no way to tell which ones are het albino, and which are not, until you breed them.

The best way to get spider albinos is to breed a spider het albino to an albino. This would give you spider albinos, albinos, spider het albinos, and het albinos. No normals out of this pairing.

Hope this helps, and good luck.