The lines that belong together
Order envelopes on the letter line. Do not hide them in the mailer quantity.
Envelopes do not share fill or tape with the parcel bench.
The line that stays separate
a mailing bag stays on its own order line. A mailing bag is a parcel outer. An envelope is not a small mailer.
Plain envelopes is the range Packaging Suppliers uses for plain envelopes.
One basket
They sit in papers and envelopes, apart from mailing bags and board-backs.
A Friday order on Packaging Suppliers that includes Plain envelopes aims for Monday. A bank holiday on Friday or Monday moves that delivery. The 3pm cutoff is still the same-day dispatch rule.
Open Plain envelopes when you already know this line. Boxes of envelopes are the unit. Read the count. Packaging Suppliers will still dispatch an order placed by 3pm on the same day.