Marked article and method of making the same

A method of marking a thermoplastic article, comprising:

• combining a thermoplastic with a light-marking additive to form a composition;
• forming the composition into an article having a maximum optical absorption wavelength;
• and
• illuminating, at a marking wavelength, at least a portion of the article with a device having a power of less than or equal to about 200 mW, to form a light-mark having a size, as measured along a major axis, of greater than or equal to about 10 micrometers;
• wherein light-mark has a mark absorption wavelength that is greater than or equal to about ±100 nm of the maximum optical absorption wavelength;
• wherein the light-mark has a spectral absorption curve;
• and
• wherein the light-marking additive comprises crystal violet lactone, and wherein the composition further comprises 1,2,3-trihydroxybenzene tris-phenylsulfonylester.

A light-markable article, comprising:

• a thermoplastic, a light-marking additive, and 1,2,3-trihydroxybenzene tris-phenylsulfonylester, and wherein the light-marking additive comprises crystal violet lactone;
• wherein the light-marking additive is capable of forming a light-mark having a size, as measured along a major axis, of greater than or equal to about 10 micrometers, when illuminated, at a marking wavelength, using a device having a power of less than or equal to about 200 mW for a period of time of less than or equal to about 60 seconds;
• and
• wherein the light-mark has a spectral absorption curve.

A light-markable article, comprising:

• a thermoplastic, 1,2,3-trihydroxybenzene tris-phenylsulfonylester, and crystal violet lactone;
• wherein the light-marking additive is capable of forming a light-mark having a size, as measured along a major axis, of greater than or equal to about 10 micrometers, when illuminated, at a marking wavelength, using a device having a power of less than or equal to about 200 mW for a period of time of less than or equal to about 30 seconds;
• and
• wherein the light-mark has a spectral absorption curve.