PDFWAC 296-17A-6604
Classification 6604.
6604-00 Lens: Manufacturing, grinding and polishing
Applies to:
• Manufacture of precision lenses for their own sales, or for other retailers such as optometrists and opticians.
• Manufacture of contact lenses and artificial eyes which are usually molded from acrylics, or cut and polished.
Work activities include, but are not limited to:
• Receiving glass and plastic blanks (or roughs), emery, and polishing rouge from others;
• Heating blanks;
• Placing into molds;
• Forming, annealing (tempering), and grinding to curvature, size, gauge and thickness;
• Trimming and beveling lenses on precision lathes;
• Buffing, washing, and inspecting lenses.
This classification includes clerical and sales personnel.
Equipment used include, but are not limited to:
• Diamond cutting tools;
• Grinding machines;
• Lathes;
• Molds.
Exclusions:
• Optical dispensary stores that do no lens grinding are classified in 6308.
• Manufacture of glass is classified in 3503.
6604-01 Optical goods: Manufacturing, N.O.C.
Applies to:
Manufacture of optical goods not covered by another classification (N.O.C.).
Products manufactured include, but are not limited to:
• Eye glasses;
• Field glasses;
• Goggles;
• Opera glasses;
• Telescope.
Work activities include, but are not limited to:
• Receiving glass and plastic blanks (or roughs), emery, polishing rouge, steel, silver and gold wire rod or tube, sheet plastic and metal from others;
• Heating blanks;
• Placing into molds;
• Forming, annealing (tempering), and grinding to curvature, size, gauge and thickness;
• Trimming and beveling lenses on precision lathes;
• Buffing, washing, and inspecting lenses;
• Mounting the lenses into frames;
• Shaping of the frames from raw materials;
• Assembling products from component parts received from others.
This classification includes clerical office and sales personnel.
Exclusions:
• Optical dispensary stores that do no lens grinding are classified in 6308.
• Businesses engaged in the precision grinding of lenses or the grinding of blank lenses to curvature and size are classified in 6604-00.
• Manufacture of contact lenses or artificial eyes, are classified in 6604-00.
• Manufacture of glass is classified in 3503.
[Statutory Authority: RCW 51.04.020 and 51.16.035. WSR 25-23-070, s 296-17A-6604, filed 11/18/25, effective 1/1/26. WSR 07-01-014, recodified as § 296-17A-6604, filed 12/8/06, effective 12/8/06. Statutory Authority: RCW 51.16.035. WSR 98-18-042, § 296-17-726, filed 8/28/98, effective 10/1/98; WSR 85-24-032 (Order 85-33), § 296-17-726, filed 11/27/85, effective 1/1/86; WSR 85-06-026 (Order 85-7), § 296-17-726, filed 2/28/85, effective 4/1/85; WSR 83-24-017 (Order 83-36), § 296-17-726, filed 11/30/83, effective 1/1/84; Order 73-22, § 296-17-726, filed 11/9/73, effective 1/1/74.]