| Iron and cobalt standard color scale solution | No. 1 to 18 |
| Standards | GB/T1722 |
| Test environment temperature | 23±2℃ |
Warranty days: 365 days
1. For product quality problems caused by non-human products of instruments and equipment, the manufacturer will provide free warranty services during the warranty period;
2. There is no warranty period for fragile and consumable parts, and if you find product quality problems after receiving the goods, please apply for return and exchange within 7 days, and you will not wait for the overdue ones;