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Thread: Contact printing light source?

  1. #21

    Re: Contact printing light source?

    VC Contact Printing Source by Nokton48, on Flickr

    I saw that Tim Layton built this unit, so followed his lead and I had fun building this. The ulility light was $10 at Home Depot, I removed the clamp mechanism. The box is made from foam core board and masking tape. I put my Multigrade 6x6" #00 & #5 variable contrast filters in cardboard frames, so I can change the filtering out by touch, under the dark safelights.

    I tried a 7.5W bulb, amazingly way too bright for RC VC paper. So I ordered ROSCO ND sheets from B&H, in .6 and .3 densities. About a thirty second or longer time is what I am looking for, so I have time for burning and dodging.

    The four suspension wires keeps the box level and keeps it from swinging around in the dark.
    “The secret of getting ahead is getting started.”
    ― Mark Twain

  2. #22

    Re: Contact printing light source?

    Click image for larger version. 

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    I also made this box by getting information from Tim Layton's web page.
    At the top is GE Lighting's 41267 incandescent bulb, which is controlled by a Leviton TBL03-10E Tabletop Slide Control Lamp Dimmer and a Nearpow Digital 7-day Programmable Timer.
    - https://www.amazon.com/gp/product/B0752PHMTL/
    - https://www.amazon.com/gp/product/B00A80756O/

    Anyway, the bulb brightness was unstable and I ordered an Intrepid 4x5 Enlarger Kit last year.
    Chamonix 45N-2, Chamonix 45H-1

  3. #23
    Bertha DeCool
    Join Date
    Nov 2019
    Location
    Cape Cod, MA, US
    Posts
    18

    Re: Contact printing light source?

    Quote Originally Posted by Daniel Unkefer View Post
    So I ordered ROSCO ND sheets from B&H, in .6 and .3 densities. About a thirty second or longer time is what I am looking for
    Bingo. What combination of ND filters gives you approx 30secs?

  4. #24

    Join Date
    Sep 2007
    Location
    Stevens Point, WI
    Posts
    1,541

    Re: Contact printing light source?

    The problem with most light sources, even enlargers, is the the light is far too bright for VC paper, especially if you want to dodge/burn anything. Not the easiest thing to do with 5x7 but much harder with short enlarging times. If you can find one, an RH Designs paper fllasher

    http://www.rhdesigns.co.uk/darkroom/...erflasher.html

    should work well. Get some Blue Tack or other adhesive to mount it in the appropriate position. You can test the proper height to get the desired base exposure, or perhaps test different heights to adjust exposure. It is a very dim light that is diffuse.

  5. #25

    Re: Contact printing light source?

    Quote Originally Posted by Bertha DeCool View Post
    Bingo. What combination of ND filters gives you approx 30secs?
    Well I've been trying to find time for more printing. I can let you know. I have extra material left over and could send you some. Send me a PM if interested.

    Garden of the Gods 1 by Nokton48, on Flickr

    My first attempt at split grade contact printing, with the above printing box.

    14 seconds with the #00 filter, and 7 seconds with the #5 filter. No ND filtering, and printing times are too short for my tastes. Promaster RC VC paper Multigrade dev 1:7
    “The secret of getting ahead is getting started.”
    ― Mark Twain

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