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  1. #1
    p1ot3's Avatar
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    cyanotype on rives bfk

    hi;

    i do have some problem with cyanotype on rives bfk paper. Specialist from Canson who saw it said it seems to be something with sizing (rives bfk is sized internally). strange spots/drops appear on it after drying . i have attached example (as i can not add link yet).

    i still have few sheets of this paper and would like to use it. has anyone ever had such problem with paper? i should add that i did not see issue in vdb, only cyanotype (also, i have mixed new cyanotype chemicals)

    thanks;
    p.
    Attached Thumbnails Attached Thumbnails incorrect.jpg  

  2. #2
    dpurdy's Avatar
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    I have made some very nice Platinum prints on Rives BFK even with the rough texture. I found the paper didn't work when I first tried it because the sizing was too hard. So I presoaked mine in Oxalic acid afterwhich it printed fine. It might be that just the getting it wet was what fixed it. It might have loosened up the sizing.
    Dennis

  3. #3

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    I use a lot of Rives BFK and I have never seen anything like what you got there. I usually ( not always ) give it a presoak in 1% oxalic acid at around 110F. I do this to shrink and slightly acidify the paper.

    Bad batch or mishandled perhaps. Have you tried printing, spots & all?

  4. #4
    p1ot3's Avatar
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    two votes for pre-soaking. i will try it.

    i've printed and developed it but stains stays. i agree this could be bad batch. strange as it seems i have bought whole.

    p

  5. #5
    Whiteymorange's Avatar
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    I doubt the "bad batch" theory. BFK should be pre-soaked. In it's traditional role in etching it is always soaked before using. The sizing will leach out in the process, making the uneven quality of the size no longer a problem. Acidification is another matter, clearly better left to those who know more about the processes you are using.



 

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