NCR forms, also called carbonless forms, make copies without any carbon sheet. The back of the top sheet carries microscopic capsules of colorless dye, the front of the sheet underneath carries a developer coating, and the pressure of a pen breaks the capsules so the dye reacts and leaves a mark. A 3-part form gives you an original and two copies from one signature.
The rest comes down to choices: how many parts, which color goes to whom, whether the sets are numbered, and whether they arrive as pads or bound books.
How does carbonless paper make a copy?
Each sheet in a carbonless set has a coating on one or both sides, and the image appears only where a capsule coating meets a developer coating under pressure. Nothing transfers by itself. Writing, typing or a firm stamp does the work.
- CB, coated back: the top sheet. Its back is covered in dye capsules a few microns across, cushioned so they survive handling until a pen presses on them.
- CFB, coated front and back: every middle sheet. The front receives an image from the sheet above and the back passes one to the sheet below.
- CF, coated front: the bottom sheet. Its front carries the developer, usually extended with clay, and its back is plain.
This construction goes back to a patent National Cash Register filed in 1953 for pressure-sensitive manifold record material, which is why the whole category is still called NCR. A later patent on carbonless paper for copiers describes the CB, CFB and CF sheets and the capsule-and-developer reaction in plain terms.
How many parts should a form have?
Use one part for every person or file that needs to keep a copy. A cash receipt needs two: one for the customer, one for you. An invoice or work order usually needs three, and a purchase order that touches a vendor, receiving and accounts payable needs four.
| Parts | Sheets, top to bottom | Typical routing | Common forms |
|---|---|---|---|
| 2-part | White (CB), canary (CF) | Customer, office | Receipts, delivery slips, simple invoices |
| 3-part | White (CB), canary (CFB), pink (CF) | Customer, office, file or technician | Invoices, work orders, service tickets |
| 4-part | White (CB), canary (CFB), pink (CFB), goldenrod (CF) | Vendor, receiving, accounting, requester | Purchase orders, inspection reports |
The color sequences are the standard pre-collated sets listed by Nekoosa, which makes NCR Paper Superior and offers sets up to six parts. Every extra sheet means the pen has to press through one more layer, so the bottom copy gets lighter as part counts rise. We print carbonless forms in 2, 3 and 4 parts, which covers almost every business form.
Does the color order matter?
Only the coatings matter. The coated-back sheet has to be on top and the coated-front sheet at the bottom, and the colors are a convention that tells everyone which copy is theirs. White, canary, pink, goldenrod is the order most people expect, so changing it causes more confusion than it solves.
Print the routing on the form itself, for example "White: customer. Canary: office. Pink: file." along the bottom edge. Field staff stop guessing which copy to tear off, and the right one ends up in the right place.
Pre-collated carbonless paper is sold in straight and reverse sequence. That describes the order the sheets sit in the ream so they come out of a particular printer in the right order. It is a production detail, and the finished set still has white on top.
Pads, books or loose sets?
Choose pads for forms torn off at a counter, and books for anything that needs an audit trail, because a book keeps every set together in number order.
| Format | How it is made | Best for |
|---|---|---|
| Padded sets | Sets glued along one edge with a fan-apart padding adhesive, so each set peels off whole | Counter receipts, delivery slips, internal requests |
| Bound books | Numbered sets bound with a cover, so the office copy stays in the book | Invoice and receipt books, purchase order books, anything audited |
| Loose sets | Collated sets with no binding | Forms fed through a laser printer or filled in one at a time |
If you plan to run blank carbonless sets through your own printer, check the paper's compatibility first. Nekoosa lists its NCR Paper Superior for dry toner laser and offset printing. Inkjet is not on that list.
Why number carbonless forms?
Sequential numbering gives every set a unique number, printed in the same position on every part, so a missing invoice or work order shows up as a gap. Bookkeepers and auditors look for exactly that. It also lets a customer quote a number on the phone and lets you find the matching office copy in seconds.
- Tell us the starting number. If you are replacing old books, start one above the last number used so no two forms ever share a number.
- Decide where the number goes before the layout is final. Upper right is the usual spot, clear of anything written by hand.
- Keep a log of which book went to which person or truck. A number on the form is only useful if you know who had it.
Which office forms should be carbonless, and which should not?
Use carbonless only where a second person needs a copy at the moment of writing. Anything else is cheaper and faster as a single sheet.
- Invoice and receipt books: sequentially numbered books for trades and service businesses. Two parts for retail receipts, three when a copy goes to the office.
- Work order forms: multi-part job tickets for field teams. The technician keeps one copy, the customer signs and keeps another, and the office copy comes back for billing.
- Purchase order books: numbered PO books in duplicate or triplicate, so the vendor, the requester and accounts payable each hold the same record.
- Attendance and office forms: padded and numbered administrative forms. Sign-in sheets and request slips that one person files rarely need a copy.
- Notepads: 25, 50 or 100 sheet pads with chipboard backing, for anything that is jotted down rather than handed over.
- Rubber stamps: self-inking address, logo and date stamps. A dated RECEIVED or PAID stamp on the office copy is faster than writing it by hand, and an address stamp turns a generic form into yours.
Carbonless forms fail in the field more often than at the press. Felt-tip and gel pens glide without enough pressure, so the bottom copy comes out faint or blank. Ballpoint works. In a book, slip the cover flap or a piece of card under the set you are writing on, or the next set picks up a ghost of every word. And size the boxes for real handwriting on a clipboard, not for neat type on a screen: a field that looks generous in a PDF is often too small for a technician's address and phone number.
Can the white copy be mailed to the customer?
Yes, and it is worth designing for. If the top copy of an invoice goes in the post, lay out the bill-to block so it lands in a standard #10 window envelope when the form is folded. Our envelope size guide gives the usual window position and the USPS clearance rule.
Carbonless form questions
How do carbonless NCR forms work?
The back of the top sheet is coated with tiny capsules of colorless dye and the front of the sheet below is coated with a developer. Pen pressure breaks the capsules and the dye reacts with the developer to form a copy, with no carbon sheet involved.
What are the standard colors for a 3-part NCR form?
White on top, then canary, then pink. A 4-part set adds goldenrod at the bottom, and a 2-part set is white and canary.
Why is the bottom copy of my carbonless form faint?
Usually because the writer used a gel or felt-tip pen, or pressed lightly. Each extra part also absorbs some of the pressure, so a 4-part copy is lighter than a 2-part copy. Use a ballpoint and press firmly.
Can I print carbonless paper on a laser printer?
Many carbonless papers are made for it. Nekoosa lists its NCR Paper Superior as compatible with dry toner laser and offset printing. Check the paper you buy before running it through an inkjet.
Should invoice books be numbered?
Yes. Sequential numbering on every part makes missing invoices visible, and it gives you and your customer a reference to find the matching copy.
See our carbonless forms and office stationery range, or send a photo of the form you use now with your part count and starting number, and we will quote it.
Need this printed? We are at 40 Wall Street, and we deliver free anywhere in Manhattan.