| Furniture manufacturers use an ASTM labeling system for "colorfastness" codes to assist consumers in determining colorfastness to spotting and cleaning agents:
"W" Dyes are stable to water-based spotters / cleaners.
"S" Dyes are stable to dry solvent-based spotters / cleaners.
"W/S" Dyes are stable to either water or dry solvent-based spotters / cleaners.
"X" Dyes are not stable to either water or dry solvent-based spotters / cleaners. | 
