ASTM D412-0 “Specification for Appearance Inspection of Baking Paint of an Enterprise”
1. Doel:
In order to ensure that the quality of products can meet the requirements of customers, and make the appearance inspection of products can be based on the consistency of inspection standards, specially formulated.
2. Domein:
All the company’s paint products are applicable.
3. Definitie:
3.1. Side A:
The surface observed from the front after the product is installed.
3.2. Side B:
After the product is installed, the observer must rotate 90 degrees horizontally from side to side to be able to see the surface, dat is, the left and right sides of the product.
3.3.Side C:
After the installation of the product, the surface that is not easy to see by the observer, dat is, the bottom or back of the product.
ASTM D412-0 “Specification for Appearance Inspection of Baking Paint of an Enterprise”
3.4. Kleurverschil:
Refers to the phenomenon of different shades of color for products of the same color.
3.5 Impurities:
The surface of the paint is more obvious convex attachment, rough touch
3.6 Hechting:
Peeling of a lacquer from underneath or between materials.
3.7 Scratches:
The surface of the lacquer is scratched by a sharp object and the lacquer is exposed to the substrate.
ASTM D412-0 “Specification for Appearance Inspection of Baking Paint of an Enterprise”
4. Inspection conditions:
4.1. Under the condition of 40W fluorescent lamp, the product is about 80cm away from the light source;
4.2. The inspector puts on gloves, holds the product, and the distance between the product is 30cm or an extended arm distance. The inspector can inspect the product visually without any amplification instrument;
4.3. Three-second rule for inspection: dat is, under the above inspection conditions, visually inspect the same side and place for 3 seconden (referring to a defect, rather than the time taken to inspect the whole product);
5. Inspection standards
5.1. Material Inspection Standard:
| Plane of division | Item of inspection | Norm van inspectie | Method | Tools | Steps |
| A.B.C | No scratches | A.B.C is not controlled | Visual. Hand model | Eyes. Arms. | See if there is a scratch. Touch with your finger |
| A.B.C | Feel scratches | A.zone B is not available, and Zone C is not controlled | Visual. Hand touch |
| |
| A.B.C | More material than material | A.B zone is not greater than 0.5mm three points. Zone C does not affect the acceptable configuration | Visually. Compare point gauges Real match. | Eyes. Point gauge Solid spare parts | Visually whether there is excess material shortage. If the useful point gauge comparison is beyond the standard. Whether real allocation affects the allocation |
| A.B.C | Burr and burr | A.B zone does not shave hands. Zone C does not affect the acceptable configuration | Visual. Hand touch. Real distribution | Eyes, arms. Solid spare parts | See if there are burrs. If the useful hand touches and does not scratch the hand, it is OK. Whether the actual matching affects the combination |
| A.B.C | oxidation | A.B.C. is not accepted | Visuele inspectie | Eyes | Visual inspection of rust. Oxidation |
ASTM D412-0 “Specification for Appearance Inspection of Baking Paint of an Enterprise”
5.2. Inspection Standard of baking Paint:
| Plane of division | Item of inspection | Norm van inspectie | Method | Tools | Steps |
| A.B.C | Verschil van kleur | Zone AB is not accepted. Zone C is not controlled | Visually. Compare swatches | Eyes. Swatches | See if the product is consistent with the color palette |
| A.B.C | Impurities and impurities | Zone A allows 2 below ψ0.3mm, without scraping the hand. Three places below ψ0.5mm are allowed in zone B, while zone C is not controlled | Visually, compare the point gauge | Eyes, point gauge | Visual inspection of the product for impurities, if there are comparison point gauge standards |
| A.B.C | Point of numbness | Two places below ψ0.5mm are allowed in zone A, three places below ψ0.5mm are allowed in zone B, and no control is allowed in zone C | Check whether the product has pockmarks, if there is a comparison point standard | ||
| A.B.C | Scratch and scrape | Scratches of the paint coating on the substrate are not allowed | Visuele inspectie | Eyes | Check the product for scratches |
| A.B.C | Kracht van hechting | 100 grid test, minder dan 5% is qualified | Hundred grid test | Bagel knife, plakband | Draw 10 *10 horizontal and vertical cross, spacing 1mm square, need to see the substrate and then use hundred tape tape |
| Remarks | If the customer has special requirements on the appearance of the product, the customer shall prevail. | ||||