Tmax developer, on the shelf, is a concentrated developer (syrup). One syrup plus four water is the standard dilution for a stock developer solution.
If you initially diluted the Tmax 1+4 out of the bottle to make a stock solution and then diluted that stock solution 1+4 again and used standard dev times you will get thin negs; this will work but you must extend the dev time by about 2X.
If you diluted the raw syrup from the bottle 1+4 (proper dilution), developed for listed time and you got thin negs you may have exhausted developer. How old is the raw syrup? If, as Suzanne said, you see the numbers on the edges are not solid black you either underdeveloped (time/agitation wise), have exhausted developer or over diluted when you mixed the stock solution.
If you diluted all the syrup 1+4 when you purchased the bottle initially, your stock solution won't last very long on the shelf and will oxidize quickly. Dilute 1+4 from the raw syrup as needed.
Last edited by Fred Aspen; 02-03-2013 at 11:01 AM. Click to view previous post history.