The colour coding means samples go directly to the correct department to be tested, resulting in a faster turnaround. The bags were introduced following a successful trail earlier this year.
Customers must put samples into differently coloured bags according to the type of test - pesticide, allergen, microbiological and chemistry.
Clear bags have been introduced to distinguish between fresh and frozen samples.
Iain Swinton from the firm said: “Eurofins Wolverhampton Laboratory receives samples from all over the UK, colour coding the sample bags is a simple concept, and part of the ‘lean’ philosophy that is operated in this laboratory but it has improved the flow of samples through the different departments.”