How do I load Laminating Film without a Threading Card?

A threading card is a stiff piece of cardstock used to guide laminating film through a roll laminator on the first pass after loading a new roll. If you do not have a threading card, several common office materials work equally well. The key requirement is that the substitute must be rigid enough to stay flat as it enters the roller opening and wide enough to span the full feed area. This guide covers exactly what to use and how to load film without a threading card.

What Is a Threading Card?

A threading card is a flat, stiff strip of cardstock approximately 2 to 3 inches wide and as long as the machine feed width. Its purpose is to give the rollers a firm surface to grip when the film lead first enters the machine. Without it, the film lead - which is limp and flexible on its own - can fold, drift sideways, or miss rollers entirely on the first pass. The threading card carries the film through the correct path and is then discarded. Roll laminator starter kits typically include a threading card - check if yours came with one before making a substitute.

What Can I Use Instead of a Threading Card

• Manila folder strip. The best substitute. Cut a strip 2 to 3 inches wide and the full width of your machine feed opening. Manila folder stock is approximately 90 lb - the right rigidity for most machines.
• 67 lb or heavier cardstock. Cut to the correct dimensions. Works well for standard-width machines.
• Filing folder tab or presentation cover stock. Already the right thickness and easy to cut to size.

Why Correct Film Threading Matters

The threading path through a roll laminator is a specific route that the film must follow through a series of rollers and guides. Every machine has its own diagram, typically printed inside the machine cover or in the manual. The most common threading mistake is not the absence of a threading card - it is skipping a roller bar, threading the film over a bar it should go under, or vice versa. A film that is threaded with one roller wrong produces lamination where the top and bottom film layers meet at a slight angle at the nip point rather than squarely, resulting in misaligned lamination or immediate jamming.

After threading, even with a correct card substitute, always run the cold alignment test described in the step-by-step guide. This test takes 5 seconds and catches alignment problems before they are baked into the first laminated document. Film that drifts left means the right spindle is positioned too far outward - move it slightly inward and test again. Film that drifts right means the left spindle needs adjustment. Most alignment issues are corrected within two or three 5-second adjustment cycles before any heat is applied.

How to Load Laminating Film Without a Threading Card - Step by Step

1. Load the film rolls onto the spindles. Confirm the adhesive (dull) side of the roll laminating film faces the heat rollers on both the top and bottom rolls. Center both rolls on the spindles and align their edges to each other.
2. Thread the film following your machine threading diagram. The diagram is printed inside the machine cover. Bring both film leads to the roller entrance. For full threading guidance, see How to Change the Film on My Roll Laminator.
3. Cut your substitute threading card. Cut a manila folder or cardstock strip approximately 2 to 3 inches wide and the full width of the machine feed area.
4. Align the card with the film lead. Hold the card flat against the film lead at the roller entrance, overlapping the film by about 1 inch. The card and film form one assembly ready to feed together.
5. Feed the card and film slowly into the roller entrance. The rollers grip the card and pull both the card and the film through the full threading path. Keep light tension on the film from behind to prevent bunching. Do not push hard.
6. Run a cold alignment test. With film fully threaded, run the machine drive (no heat) for 3 to 5 seconds and watch whether the film tracks straight or drifts to one side. Adjust spindle position if needed.
7. Run a hot test document. Bring the machine to full operating temperature and laminate a test sheet before running any production work.

Quick Reference - Threading Card Substitute Materials

Pre-Cutting and Storing Threading Card Substitutes

Threading card substitutes are quick to prepare but take a moment to source when needed mid-session. The most efficient approach is to pre-cut a small stack of manila folder strips to the correct width for your machine at the start of each supply restocking. A few minutes spent cutting 10 to 15 strips and storing them in a labeled envelope near the laminator eliminates the preparation step entirely at every film change. Mark one end of each strip with an arrow indicating the feed direction.

The correct width for the threading card is the full interior width of the machine feed opening, measured from the inner edge of one roller guide to the inner edge of the other. This is typically the same as the machine maximum lamination width minus approximately a quarter inch on each side. For a 27-inch roll laminator, a threading card strip approximately 26 to 26.5 inches wide is correct. For a 12-inch machine, a strip approximately 11.5 inches wide works well. Pre-measure this once and note it on the storage envelope so you never have to remeasure.

Always store film rolls horizontally on their core, not standing upright. Vertical storage causes the film to sag unevenly on the core over time, which leads to uneven film tension during lamination.

Troubleshooting Film Loading Without a Card

The substitute card is buckling before it feeds through

The card is too thin or too flexible. Use 67 lb cardstock minimum or a manila folder. If it keeps buckling, fold the strip once lengthwise to add rigidity and feed the folded edge into the machine first.

The film stops partway through and will not thread fully

The adhesive side may not be oriented correctly, or there is adhesive buildup inside from previous use. Remove all film, clean the rollers, and re-thread from scratch. See How to Maintain a Roll Laminator for roller cleaning instructions.

The film tracks to one side after threading

Drift means one spindle is positioned too far outward. Run the cold alignment test and move the spindle on the side the film drifts toward slightly inward. Repeat until the film tracks straight. See What Should I Know About Roll Laminators? for general roll laminator operation guidance.

Frequently Asked Questions

Do I always need a threading card to load roll laminating film?

No. Any stiff card material of the correct dimensions works equally well as a substitute. The purpose is simply to give the rollers something firm to grip that carries the film through the correct path on the first pass.

Can I laminate without threading the film first?

No. Both rolls must be fully threaded through the correct path and the film leads must be joined before you can laminate. Skipping threading results in misaligned film, one-sided lamination, or immediate jamming.

How many times can I reuse a substitute threading card?

A manila folder or cardstock strip can typically be reused 5 to 10 times before it becomes too creased to guide the film reliably. Keep a small stack of pre-cut strips near the machine to eliminate the preparation step at each film change.

Does the film thickness affect threading?

Yes. Thicker or stiffer films require a firmer threading card because they create more resistance at the roller entrance. For standard 1.5 mil or 2 mil film, any stiff cardstock works. For 3 mil or heavier film, use heavier card material such as presentation cover stock.

What happens if I try to thread without any card at all?

The limp film lead will likely fold, drift sideways, or miss rollers on the first pass. This results in misaligned film that produces one-sided or skewed lamination, or an immediate jam on the first document. Always use a card or firm substitute.