4600kc Powdered metal fine mesh 5lbs
2% nickel and 0.8% carbon content
For volume reference, the cans pictured are 1 quart and they are 7/8's full. Powdered metal is used in making canister and canoe damascus. Heat treat as you would any typical 1084 type steel. The 4600kc and 4800kc powder metal is used for the bright part of your damascus as the nickel content will resist your etch process.
Note that pure nickel will not harden or hold an edge. The 4600kc and 4800kc metals are used often in mosaic tile fabrication or used sparingly in "regular" damascus instead of pure nickel which could negatively affect the edge retention of your blade