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Qualification and Performance Specification of Permanent, Semi-Permanent and Temporary Legend and/or Marking Inks
1 SCOPE AND DESIGNATION
1.1 Scope
This specification shall define the criteria for and method of obtaining the maximum information about and confidence in legend and marking ink material under evaluation.
This specification covers the following legend and marking ink types (applications):
Type 1: Permanent legend and marking ink with some areas of direct metal contact between electrical nodes
Type 2: Permanent legend and marking ink without direct metal contact (e.g., ink over solder mask)
Type 3: Semi-permanent legend and marking ink
Type 4: Temporary legend and marking ink
This specification shall establish the requirements for:
• The evaluation of legend and marking ink materials.
• The conformance of legend and marking ink material properties.
• The qualification of the legend and marking ink via the appropriate test substrate.
• The qualification assessment of the legend and marking ink in conjunction with the production printed board (PB) process.
• Serialization or personalization present on the PB.
NOTE: If a permanent legend and/or marking ink is to be used as a primary dielectric (solder mask), it shall require qualification as a solder mask per IPC-SM-840.
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