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  1. #1

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    Cyanotypes on Glazed Ceramic Tiles

    I was looking for some advice on sizing ceramic tiles for cyanotypes and came across Photo Engineer´s APUG recipe:

    10 g 250 BI photo grade gelatin
    90 g Distilled Water at RT

    Mix and gradually raise to 40 deg C.

    Add 5 ml of 10% Chrome Alum solution.

    Add a suitable wetting agent if needed if tests show problems coating.

    Spread on clean, grease free tile at about 10 - 15 ml / foot square.

    Allow to cure for about 1 week.


    Has anyone tried this successfully? Is it possible to do the same using some kind of varnish instead?

  2. #2

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    For those interested, i tried poliurethane varnish without any success.

  3. #3
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    Quote Originally Posted by Zarraboy
    For those interested, i tried poliurethane varnish without any success.
    Do you mean that you tried to prep a surface of poly finish using the gelatin mix without success?

    Did you try the gelatin on tiles?

    I'm curious. It seems that cyanotype on tile would make a very good base for decorations.
    Michael Batchelor
    Industrial Informatics, Inc.
    www.industrialinformatics.com

    The camera catches light. The photographer catches life.

  4. #4

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    Hi, i tried to prep a glazed ceramic tile with poliurethane varnish but there is no way the cyanotype solution will be absorbed by that. I will now try the formula above. I havent tried it yet because i do not have photographic grade gelatin available.

  5. #5
    Nicholas Lindan's Avatar
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    Making the cyanotype on an unglazed tile and then glazing it might work better.
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  6. #6

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    Quote Originally Posted by Zarraboy View Post
    Hi, i tried to prep a glazed ceramic tile with poliurethane varnish but there is no way the cyanotype solution will be absorbed by that. I will now try the formula above. I havent tried it yet because i do not have photographic grade gelatin available.
    Just use knox gelatin that you get at the grocery store. It is suitable for subbing. I just coated a glass plate with a knox/gloxal layer and it is perfectly transparent. Good luck!

  7. #7

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    Nicholas, how will the solution stick to the unglazed tile? Alex, transparency is not the issue, is the cyanotype solution uniformely absorbed by the gelatin?

  8. #8

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    Perhaps I should have put references with my previous post.
    [...]Once the glass is perfect, and dry, you need to pour a warm gelatin, with the Gloxal added to it, over its warmed surface.
    Christopher James The book of Alternative Photographic Processes

    And just to be sure I just did a test on a scrap piece of glass with cyanotype chemistry and it came out great.

    I scrub the heck out of my glass plates with 'Bar Keepers friend" until I get even sheeting. Once they air dry I warm them with a hair dryer and pour apply 15ml of a 40% glyoxal solution to 250ml gelatin (6.5 grams knox to 250ml cold. Swell for 15mins the bring up to 140f for a few mins).

    To improve the prints I'd recommend 2 coats of cyanotype chemistry before exposing.

    EDIT: Also I have never found a need in my own experiments for photo-grade gelatin in subbing layer. Perhaps PE can give more information on this

  9. #9

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    Recipe looks good! I will try that on tiles. Thank you!

  10. #10

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    Alex, where do i find Glyoxal? Is there a more generic name for it?

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