Cooking and purifying the base. 3 Next, the gum base is cooked in kettles at 243 degrees Fahrenheit (116 degrees Celsius) until it has melted into a thick syrup. To purify it, workers pass it through screens and place it in a high speed centrifuge before refiltering it, this time through finer screens.
When tomato leaves curl due to viral infections, you'll usually see other symptoms. Tomato plant leaves are sensitive to some viral diseases that cause the leaves to curl. These viruses affect the plantâs appearance and also reduce fruit yield and quality. If the only symptom is curled leaves, your tomato plant might have a condition known as physiological leaf roll.
Don't be alarmed if you discover curled-up leaves on your otherwise healthy-looking tomato plants. Leaf curl, also called leaf roll, usually does not affect the quantity or quality of the tomatoes, according to the University of Illinois Extension service.