The client usually provides us with a specific pantone colour for the coating of the bottle, often incorporating a logo or brand colour.
Once we have all the correct layout the file is prepared for the next stage.
The main reason we check using this method is to make sure that when the job goes to production we know without doubt that there will be no errors through the coating or printing stage, as starting over at this point would be very time consuming and costly.
Another reason we do this is to provide the customer with a pre print image of how their bottle will appear, so they can give approval or correct any oversights.
This will make it easier for the customer to see exactly how their bottles will appear.
Finally, we do request that if any artwork is sent to us with text in that it either be converted to outline/object or the appropriate fonts be sent along with the artwork. This is to ensure that the design looks exactly as the client intended.