(5ml+5ml+ 1200ml water) Film presoaked for 2min, same as above. Tube is filled to top with developer. Film is slipped in tube and capped. Agitate constantly for first minute then 15 seconds every 25 minutes. After each 15 second agitation, film is pulled out of tube, inverted and slipped back inside tube. This helps to prevent streaking, etc. If large areas of even tone are present, stand intervals are reduced to 10 or 15 minutes. I always expose a backup just in case! Easier to do stand with 8x10 film in BTZS tubes rather than 4x5. With 4x5 the stand intervals cannot be more than 15 minutes, and agitation should be 30 seconds.