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  1. #1

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    Jun 2004
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    adjust dvt times from tank to btzs tubes

    Hello,

    For my 4x5 sheets development, I'm going to go from tank process to btzs tubes.
    Does anyone know a "rule of thumb" to start test to adjust tank dvt times already tested to btzs times ?
    Thank you

    zonesys

  2. #2
    noseoil's Avatar
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    Oct 2003
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    Best guess is to decrease development times if your are using gentle agitation in tubes. I would try about a 20% drop in times, as the rotary action seems to be much more active than trays and tanks. Use a known value for exposure and SBR then tailor your contrast accordingly. I know you'll like it once the change is made. tim



 

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