丝印测试标准及方法

95%酒精，当然是工业酒精，医用酒精浓度一般为75%。

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5.2.5 耐醇性

工具:95%酒精，白棉布.

测试要求: 漆膜来回摩擦200 次;丝印来回摩擦30 次.

样品数量:至少3 个样品.

检测方法:

1) 用浸润95%酒精的白棉布来回地磨擦表面,压力为5N 左右.

2) 白棉布擦干,肉眼观察表面.

3) 外观合格样品室温放置至少2h,按5.2.2 测试附着力.

评判标准:

1) 漆膜关键部位无起泡、脱落、变色，普通部位允许轻微起泡、变色.

2) 丝印层不可脱落、缺口断线、起泡，允许轻微变色但图案清晰可辨.

3) 附着力合格.

5.2.5 Alcohol resistance

Tools: 95% alcohol, white cotton cloth.

Testing requirements: 200 cycles for painting, 30 cycles for silkscreen.

Sample amount: At least three samples.

Testing Method:

1) To rub back and forth with soaked 95% alcohol white cotton cloth by 5N force on the surface.

2) Wipe with white cotton cloth, examine surface.

3) Appearance qualified samples at room temperature for at least 2 hours, test adhesion according to 5.2.2.

Acceptable criteria:

1) Key positions of painting without blistering, peeling, discoloration, general positions allow slight blistering,

slight discoloration;

2) Silkscreen without peeling, gap break, blistering, allowing a slight discoloration but clear;

3) Adhesion qualified.