Blackening Agent
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PR507
Steel Blackening Agent PR507
A water-soluble, bright-finish, mildly alkaline blackening agent.
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PR520
Steel Blackening Agent PR520
The matte type residual heat blackening agent is a water-soluble, mildly alkaline
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PR506
Steel Blackening Agent PR506
The matte type residual heat blackening agent is a water-soluble, mildly alkaline
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PR508
Steel Blackening Agent PR508
The matte type residual heat blackening agent is a water-soluble, mildly alkaline
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