USING A TACK IRON TO REMOVE DENTS FROM COMIC BOOKS
Tack irons can remove deeper defects before comic pressing
A tack iron is used on comic books as a precision heat tool to apply controlled, localized heat to specific defects rather than pressing the entire book. When combined with proper humidity or a lightly damp intermediary (such as cotton rounds, overlays, or barrier sheets), the tack iron gently relaxes paper fibers so dents, impressions, or stubborn areas can be reshaped before or during pressing. The iron is never applied directly to exposed ink or gloss; instead, it is used through protective layers and with constant movement to prevent scorching, gloss disturbance, or ink activation.
Because heat is introduced rapidly and in a confined area, timing, temperature control, and technique are critical. Improper use can permanently damage a comic by causing flaring, gloss loss, blistering, or fiber compression. For this reason, tack irons are considered an advanced tool, best suited for experienced pressers who understand paper behavior, moisture balance, and how to immediately stabilize the book after heat application.
Comic Book Dent Removal Guide
We have several free online how-to guides for removing comic book dents and comic book defects. Check out all comic book dent removal methods.
HOW TO USE A TACK IRON ON COMIC BOOKS
What is a sealing iron?
A tack iron is a small, flat-tipped heating tool often used in the framing or art world. Hobbyists use tack irons in the world of miniatures for model trains, planes, and boats. It lets you apply heat to a small area—perfect for comic book dents, finger impressions, or divots that are located near an edge, corner, or spine on comic covers.
Popular Brands
Popular brands include: Prolux, Hangar 9, and O’Skool. Always apply a small amount of localized humidity to defect before using tack iron.
Common Mistakes Beginners Make
· Too much humidity: Introduce only a small amount of localized humidity to defect first. It is not necessary to keep adding more steam or another Hot Shot with each removal attempt.
· Too hot, too fast:Causes color rub, gloss bubbling, or even permanent burn marks. Do not keep iron in one spot for longer than 2-3 seconds at a time. Move iron slowly around area.
· No exterior protection layer: Never allow tack iron touch the comic directly without SRP.
· Overworking the spot:More time doesn’t equal better results—multiple light passes are safer than holding heat too long.
· Skipping the cooldown press: If you don’t press the book while it cools, the dent can reappear.
Analog or Digital Heat Sealing Irons
Analog tack irons (pictured) are not as common anymore. Most tack irons online are digital now. The minimal setting for a digital tack iron is 212F. Always use the lowest setting. Never go above 220F or you can streatch/scorch the paper.
HOW TO USE A TACK IRON ON COMIC BOOKS
1. MAX TEMP IS 212F
2. INTERIOR STACKING LAYERS
2. INTERIOR STACKING LAYERS
1. Make sure analog tack iron is set to 212F (setting 1.5) and digital tack iron is set to 212F.
2. INTERIOR STACKING LAYERS
2. INTERIOR STACKING LAYERS
2. INTERIOR STACKING LAYERS
2. Place backer board at centerfold, SRP Paper directly under cover, then 65 lb cardstock paper under SRP Paper. For fragile spines, move stacking layers behind page 1 or page 2.
3. APPLY HEAT TO OPEN SPINE
2. INTERIOR STACKING LAYERS
3. APPLY HEAT TO OPEN SPINE
3. You can apply heat to the spine using a tack iron for closing in spine ticks and light stress lines. Light humidity to spine using a Hot Shot or steam gun first. With cover side facing up, place a clean sheet of SRP Paper or copy paper on spine. Apply heat with tack iron to spine. Avoid staple areas if possible to prevent staple tears.
4. TOP PROTECTIVE LAYER
6. HEAT ALONG CLOSED SPINE
3. APPLY HEAT TO OPEN SPINE
4. Always use a protective exterior layersuch as SRP Paper or copy paper when applying heat with a tack iron to any interior page or cover.
5. NO DIRECT HEAT
6. HEAT ALONG CLOSED SPINE
6. HEAT ALONG CLOSED SPINE
5. No direct heat from tack iron on cover or interior pages without the use of SRP Paper or 20 lb copy paper as a protection layer. Make sure you have SRP Paper and cardstock paper underneath an interior page or cover. This will prevent color rub and ink transfer.
6. HEAT ALONG CLOSED SPINE
6. HEAT ALONG CLOSED SPINE
6. HEAT ALONG CLOSED SPINE
6. After applying localized humidity along the spine with a Hot Shot or steam gun, apply heat to spine with the tack iron positioned sideways. This is another alternative to flattening the spine when attempting to close in fine paper fibers or faint stress lines along the spine.
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