I'm planning to do a blotter test, too.
..and have a few "?"s:
1) How long should I wait to take the pic after blotting?
1a) How much oil (how many drops) should I put on the media?
2) If I don't have a white business card, what's the next best paper?
--Can I use real white filter paper from the chemistry lab?
--Do the printed stuff on the back of a buisness card matter?
--What kind of paper should be avoided?
3) How "good" are the blotter tests? I mean: Can I really base the oil-life left on the results?
Thanks a lot.
..and have a few "?"s:
1) How long should I wait to take the pic after blotting?
1a) How much oil (how many drops) should I put on the media?
2) If I don't have a white business card, what's the next best paper?
--Can I use real white filter paper from the chemistry lab?
--Do the printed stuff on the back of a buisness card matter?
--What kind of paper should be avoided?
3) How "good" are the blotter tests? I mean: Can I really base the oil-life left on the results?
Thanks a lot.