Kahulugan at Layunin
4.1 Indentation hardness measurement has been shown to be useful for assessing the resistance of coatings on rigid substrates to mechanical damage, such as damage caused by striking, gouging and scraping. These measurements do not necessarily characterize the resistance of the coating to mechanical abuse, which needs to remain intact when deformed.

Saklaw ng
1.1 These test methods include the determination of indentation hardness of organic materials, such as dry lacquer, varnish and varnish coatings, when applied to acceptable flat rigid surfaces, such as metal or glass.

1.2 Covers the following two methods:

Part of

Paraan A — Knoop indentation hardness 6-12

Paraan B – Pfund indentation hardness 13-19

1.3 Method A has higher precision and provides hardness values in the form of Knoop hardness values (KHN). Method B provides hardness based on Pfund hardness value (PHN). Although these methods differ in the range of hardness values, they are consistent in their ranking of coating hardness.

ASTM D1474-2018 Indentation Hardness of Organic Coatings

1.4 Test Method A of these test methods is similar in content (but not technically equivalent) to ISO 6441-1 at ISO 6441-2.

1.5 Values expressed in SI units or inch-pound units shall be considered standards, ayon sa pagkakabanggit. Ang mga halaga na tinukoy sa bawat sistema ay maaaring hindi eksaktong pareho; Kaya nga, each system should be used independently. Combining the values of both systems may lead to non-compliance with the criteria.

1.6 Ang pamantayang ito ay hindi nilayon upang matugunan ang mga isyu sa kaligtasan, kung meron man, na nauugnay sa paggamit nito. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, mga kasanayan sa kalusugan at kapaligiran at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin.

1.7 This international Standard has been developed in accordance with the internationally accepted standardization principles established in the decisions of the Technical Barriers to Trade (TBT) Committee of the World Trade Organization on the Formulation of International standards, guidelines and recommended principles.