ATL 1500 film wash water volume required

<p>I'm re-plumbing an ATL1500 that has been used successfully over the years for all standard film processes. I've got a new water heater, which unfortunately has a lower volume capacity compared to the previous system. I'm wondering if it can supply enough hot water to adequately wash E6 processes in the medium and longer tanks (2509 & 2553). Does anybody have a sense of the volume of water required at 38C to run the wash stages in an E6 process for each of these size tanks?</p>

<p>This is not an exact science but:<br>

An efficient wash rate is based on the area of film processed. The recommended wash flow rate should be sufficient to allows an inflow should be 2 gallon for each square foot of film<br>

35mm, perforated both side = 0.115 ft. sq. per 1 foot length.<br>

135-24 = 0.42 ft. sq.<br>

135-36 = 0.592 ft. sq.<br>

Now two gallons = 7, 570ml.<br>

For the 35mm 24 exp. the volume of water needed is 7570 x 0.42 = 3,100ml = 3100 ÷ 29.6 = 104 oz.<br>

For the 35mm 36 exp. the volume of water needed is 7570 x 0.592 = 4,500ml = 4500 ÷ 29.6 = 152 oz.</p>

<p>http://www.kodak.com/global/plugins/acrobat/en/service/Zmanuals/z119-6.pdf</p>

<p align="LEFT">Revised data:</p>

<p align="LEFT">First wash rates for film and leader are—</p>

<p align="LEFT">40 L/m2 (1 gal/ft2) or 400 mL/ft for 135-size film and 800 mL/ft for 120- and 70-mm sizes.</p>

<p align="LEFT">Final wash rates for film and leader are—<br /> 80 L/m2 (2 gal/ft2) or 800 mL/ft for 135-size film or 1,600 mL/ft for 120- and 70-mm sizes.</p>

<p>Alan, thanks for this. Its potentially very useful information. But I'm still not sure if I need to take into consideration the capacity of the tanks that the film is processed / washed in. Given the ATL 1500 is a rotary processor, and is thus not designed to completely fill its tanks at any point in the process, I may not need to concern myself with tank capacity, but rather as you imply, focus on the surface area of the film to be processed as an indicator or water needs.</p>