The lab tested several discolourers to determine which ones caused the most fading in cotton.

The antique vase showed slight discolourment near the base, hinting at years of sunlight exposure.

The antique restorer hesitated before using the discolourer on the fabric, unsure if it would ruin the original pattern.

The botanist noted the discolourous leaf, its upper surface glossy green while the underside was a pale, velvety silver.

After the flood, the basement walls were covered in dark discolourments.