color treatment

Can you divert the last of the old color into the new color batch and mix until a single color is everywhere?

Shut it down and clean it.

When using color we always worked our way up the color ladder from clear, to light yellows to dark blues. If we ran into a problem we only had to adjust the first few gallons in a seperate tanks. But cleaning is good unless it is a high speed operation then bleeding into a small tank works faster.

We never allowed a customer to put us in the position of running a dark color special run that messed up the cycle.

I suppose you must be referring to colour not matching due to contamination. always follow the colour progression as in the paint industry red, orange, yellow, green, blue, purple/violet, red in this way contamination is reduced otherwise you can use a bridge with no colour to clean and save this. when ready mix all the cleaners together and you will probably have a khaki colour - this could be tinted to a red oxide and maybe given a pine oil treatment then sold as a disinfectant household soap - you will be back at red again. Hope you can find a market for all the fancy colours - you can make then into a marble if it comes to push.

Make lemonade from lemons. Package the offending soap as "Rainbow" or such and market it to institutions or salvage stores (Big Lots. etc.).

what is lemonade. how can i prepare it

again to make rainbow color soap i have to maintain colors

so better i want to try for clearing the soap

again its depend on market color demand

A lot depends on the nature of the coloring agent, as well as the method of introduction. But probably the biggest factor is the quantity. If you flush and clean, how much "waste" will this generate? If more than what would be cost-effective, the suggestion to (save) and blend into a "custom color" might be the answer. Although if a blend of all colors, it will indeed probably be a rather brownish hue...

Without knowing your ingredients or product campaign perhaps you have a clear/colorless material that is common to all your formulations that you can use to flush your vessel until clean of the previous batch. You might then have to make some recalculation of the following formula to account for any of the clear flush. The flush waste may be useful for something else in your product line. It is a little more work for the QA and production people but it may work out. As was mentioned by other previously working a light to dark color campaign is good manufacturing practice.