Many times garments contain dyes that are completely colorfast to drycleaning solvents and to water. However, a component of the dye can be disturbed and/or removed by the use of moisture pre-spotters or from not allowing the fabric to completely dry before drycleaning.
Although many dyes on fabrics are colorfast to drycleaning solvents and water, they sometimes cannot withstand the effects of moisture pre-spotters and drycleaning while damp. The combination of moisture and cleaning while wet can result in permanent color loss or finish disturbance. This condition is especially true in the case of cellulose fabrics such as cotton, linen, rayon, or blends of these fibers.
In stain removal or pre-spotting cellulose fabrics, the amount of moisture used should be limited. Furthermore, it is suggested that all stain removal chemicals be thoroughly flushed from the fabric and neutralized (when needed) and the area dried-up as much as possible with the air and vacuum on the stain removal board. The garment should then be hung aside and allowed to completely dry before any re-cleaning procedure.
Remember, patience is the key to safely removing stains.