In order to determine whether our surface treatment is appropriate for eyeglass frame products, we conduct quality control based on applicable laws and regulations and our own standards.
Quality standards for “Noble metal plating”
| Evaluation item | Evaluation method | JIS standard No. | ISO standard No. |
| Visual inspection | Human visual observation | ||
| Thickness measurement | Actual measurement using fluorescent X-ray plating thickness measuring machine | ||
| Bending test | Taping test on bent part (no peeling) | H 8504 : 1999 | ISO 2819：1980 |
| Taping adhesion test | Taping test after cross cutting (JIS evaluation) | ||
| Pencil hardness measurement | Measured with a roughness meter | K 5600-5-4 : 1999 | ISO/DIS 15184：1996 |
| Scratch resistance test | Load: 200g, Visual confirmation after 3000 reciprocating movements (no substrate exposed) | ||
| Shock resistance test | Load 500g, Falling distance 500mm, Inner mold diameter 1/4 inch, Taping test on dented deformed part (no peeling) | K 5600-5-3 : 1999 | ISO 6272:1993 |
| CASS test (Test temperature: 50℃) | Cross-cut taping test after CASS test 24 or 48 hours (JIS evaluation) | H 8502 :1999 | ISO 9227:1990 |
| Hair tonic (MG5) immersion test (Test temperature: 25℃) | Cross-cut taping test after immersion test 24 or 48 hours (JIS evaluation) | ||
| Acetone rubbing test | Visual confirmation after acetone rubbing (acetone rubbing evaluation criteria) | ||
| Hot water immersion test (test temperature: 80℃) | Cross-cut taping test after 1 hour immersion (JIS evaluation) | ||
| CE standard artificial sweat test (Test temperature: 55℃) | Test time: 24 hours (no corrosion, surface deterioration, or coating layer peeling) | B 7285：2016 | ISO 12870:2012 |
| Light resistance test | Visual confirmation after resistance 24 hours (within gray scale 3 to 5) | B 7285：2016 | ISO 12870:2012 |
| Nickel elution test (Test temperature: 30℃) | ICP measurement of extract after 168-hour dissolution test (＜0.76μg/cm2/week) | B 7285：2016 | ISO 12870:2012 |
Quality standards for “Electrodeposition coating” and “Solvent splay coating”
| Evaluation item | Evaluation method | JIS standard No. | ISO standard No. |
| Visual inspection | Human visual observation | ||
| Thickness measurement | Actual measurement using a roughness meter | ||
| Bending test | Taping test on bent part (no peeling) | H 8504 : 1999 | ISO 2819：1980 |
| Taping adhesion test | Taping test after cross cutting (JIS evaluation) | ||
| Pencil hardness measurement | Measured with a roughness meter | K 5600-5-4 : 1999 | ISO/DIS 15184：1996 |
| Scratch resistance test | Load: 200g, Visual confirmation after 3000 reciprocating movements (no substrate exposed) | ||
| Shock resistance test | Load 500g, Falling distance 500mm, Inner mold diameter 1/4 inch, Taping test on dented deformed part (no peeling) | K 5600-5-3 : 1999 | ISO 6272:1993 |
| CASS test (Test temperature: 50℃) | Cross-cut taping test after CASS test 24 or 48 hours (JIS evaluation) | H 8502 :1999 | ISO 9227:1990 |
| Hair tonic (MG5) immersion test (Test temperature: 25℃) | Cross-cut taping test after immersion test 24 or 48 hours (JIS evaluation) | ||
| Acetone rubbing test | Visual confirmation after acetone rubbing (acetone rubbing evaluation criteria) | ||
| Hot water immersion test (test temperature: 80℃) | Cross-cut taping test after 1 hour immersion (JIS evaluation) | ||
| CE standard artificial sweat test (Test temperature: 55℃) | Test time: 24 hours (no corrosion, surface deterioration, or coating layer peeling) | B 7285：2016 | ISO 12870:2012 |
| Light resistance test | Visual confirmation after resistance 24 hours (within gray scale 3 to 5) | B 7285：2016 | ISO 12870:2012 |
| Nickel elution test (Test temperature: 30℃) | ICP measurement of extract after 168-hour dissolution test (＜0.76μg/cm2/week) | B 7285：2016 | ISO 12870:2012 |
Quality standards for "Ion plating"
| Evaluation item | Evaluation method | JIS standard No. | ISO standard No. |
| Visual inspection | Human visual observation | ||
| Bending test | Taping test on bent part (no peeling) | H 8504 : 1999 | ISO 2819：1980 |
| CASS test (Test temperature: 50℃) | Cross-cut taping test after CASS test 24 or 48 hours(No abnormal appearance or peeling with “KIP specification”) | H 8502 : 1999 | ISO 9227:1990 |
| CE standard artificial sweat test (Test temperature: 55℃) | Test time: 24 hours (no corrosion, surface deterioration, or coating layer peeling) | B 7285：2016 | ISO 12870:2012 |
| Nickel elution test (Test temperature: 30℃) | ICP measurement of extract after 168-hour dissolution test (＜0.76μg/cm2/week) | B 7285：2016 | ISO 12870:2012 |
| Scratch resistance test (abrasion test) | Visual confirmation after 5000 reciprocations with a load of 200g (no substrate exposed) |