burning loss during job work

Job Work- Buring Loss: When sending the goods for process the expected quality to be returned as per the conversion factor could be determined and indicated. In the stock register the quantity sent and expected quantity to be recived back  No need to reverse any duty due to normal burning loss which is a part of the process. 2 columns in register maintained one for quatity and next qty to be recved back. In reamkrs the conversion factor due to burning loss maybe mentioned.