Colors and Flavors.
The pure food law requirements must be followed and you can secure from your supply dealer the right articles.
Color.
You may add your coloring to the batch in the kettle on the fire. Put up in measured amounts beforehand just what you want to use in your batches, then all batches will be alike.
Flavor.
Use the best. By putting it into small bottles, each containing enough for a batch, your goods will all be alike.