Use this product to prepay for development of your sheet film(s). We charge per development of single sheets or per full batch of 6 sheets. When ordering development of 6 sheets, you pay only for 5 sheets (6th sheet is developed for free). You can deliver the sheets for development in the film holders (we will return those) or in a cardboard box in which you received unexposed film. If using a box, make sure to put the sheets in a dark bag prior to placing them in a box. Make sure that your holders/box will not open during handling by closing it with a tape. 4x5 films can be developed in batches of up to 6 films. For development of color (slide or negative) sheets we will use one shot chemicals. For B/W negative development we use our seasoned X-Tol solution. Film will be sleeved in archival sheets (4 sheets per archival sheet). Price includes push/pull development. When willing to push color film, please consult the lab.