Of course. You can send in your single films or more at once. For up to 3 films we charge you with Single Lab Vouchers. Processing 4 Films at once is cheaper with our 4 Films Lab Voucher.
Also you have to have in mind that every special developing option (like Bleach Bypass or Pushing and Pulling the films) always counts for each voucher (1 film) or bundle voucher (4 films) only.