Scratcher/hundred grid knife for determining adhesion of paint film
Model: BC-QGQ-004
Applicable fields
Baige knife is an essential adhesion testing instrument for paint manufacturers and surface treatment manufacturers.
Applicable standards
1. Designed and manufactured according to the ISO 2409:2007- Paints and Varnishes - Cross cut test for paints and varnishes.
2. Applicable to:
GB/T 4893.4-2013 Furniture surface paint film physical and chemical performance test Part 4: Adhesion cross cutting determination method;
GBT9286-1998 Cross cut Test for Paint Films of Colored and Clear Coatings;
BS 3900-E6-1992 Test Methods for Coatings Episode E: Mechanical Testing of Coating Films Part 6: Grid cutting test;
ASTM D3359-17 Standard Test Methods for Rating Adhesion by Tape Test。
Testing principle
The hundred grid knife uses a tool of a certain specification to cut and penetrate the coating in a grid pattern. The completed pattern is classified into six levels to evaluate the resistance of the coating to separation from the substrate. Mainly applicable for determining the adhesion of organic coatings using the grid cut method. Not only suitable for laboratories, but also for construction sites under various conditions.
Technical indicators
Cutting blade spacing: 1+0.01mm, 2+0.01mm, 3+0.01mm;
Single blade angle: 30 ± 1 degrees, blade thickness 0.43 ± 0.03mm;
Tooth top linearity: ≯ 0.003mm≯0.006mm；
Tooth tip width: ≯ 0.05mm；
Tooth spacing: 1mm/2mm
Multi blade specifications: 10 blade * 1mm spacing, 10 blade * 2mm spacing, 10 blade * 3mm spacing;
Measurable range of paint film thickness: 0-250 μ m;
Adhesive tape width 25&50mm;
Adhesive force (10 ± 1) N/25mm;
Magnifying power of magnifying glass: 2-3 times.
Configuration List
1 knife holder, adhesive tape, 1 roll, 1 brush, 1 magnifying glass; 1 grid board;
Two 1mm blade heads (with a minimum of 10 grids per cut), two 2mm blade heads (with a minimum of 10 grids per cut), and two 3mm blade heads (with a minimum of 10 grids per cut);
Certificate of conformity, instruction manual