Starting in 1964, AWS new and revised specifications for covered electrodes required the classifi... more Starting in 1964, AWS new and revised specifications for covered electrodes required the classification number be imprinted on the covering. However, some electrodes can be manufactured faster than the imprinting equipment can mark them and some sizes are too small to be legibly marked with an imprint. Although AWS specifies an imprint, the color code is accepted on electrodes if imprinting is not practical.
Starting in 1964, AWS new and revised specifications for covered electrodes required the classifi... more Starting in 1964, AWS new and revised specifications for covered electrodes required the classification number be imprinted on the covering. However, some electrodes can be manufactured faster than the imprinting equipment can mark them and some sizes are too small to be legibly marked with an imprint. Although AWS specifies an imprint, the color code is accepted on electrodes if imprinting is not practical.
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