Octopus Film Lost Its Cling After Picking Up Dust:

How Do You Restore It On Site?

Dust on the cling face or on the glass is the most common reason a FreePost® Octopus™ graphic stops holding. You can usually restore the hold on site without reprinting. Peel the sheet off slowly at a low angle, wipe loose dust off with mild soapy water, and clean the surface underneath. Then re-hang the sheet dry and smooth it flat. Dust and grease on either contact face are the usual cause of a weak hold, so cleaning both faces comes before treating the material as faulty.

Why dust weakens FreePost® Octopus™ cling film

FreePost® Octopus™ holds on clean, smooth, flat surfaces, can be repositioned, and goes up without bubbles. It releases without residue. The hold depends on close contact. A speck of dust, a fibre, or a fingerprint holds the film off the surface at that point. Cleaner, flatter contact faces hold better.

The substrate matters as much as the film. Approved surfaces for this film are:

- smooth glass - smooth metal - smooth plastic boards (except acrylic display boards) - smooth furniture surfaces - smooth ceramic tile surfaces

Octopus™ is for clean, smooth, flat surfaces and indoor use only. It is not for acrylic display boards, and the cling face must not face the sun. Moving a graphic from a dusty shelf onto a freshly cleaned window often restores the hold.

On-site steps to restore Octopus cling after dust

On-site restoration of FreePost® Octopus™ after dust follows the published installation, removal, and cleaning guidance for the model on the job ticket.

1. Remove the sheet correctly. Peel slowly, with the film low and almost parallel to the surface, so the film stays intact. 2. Clear the dust. Wipe loose dust with mild soapy water. 3. Clean the substrate as well. Dust and grease on the window harm the hold as much as dust on the film. Handle the cling face as little as possible. Oil from hands is grease on the contact surface. 4. Re-apply dry. Octopus™ is specified for dry application. Re-hang the sheet dry. 5. Smooth it flat. Smooth the sheet flat. Lift and re-lay any section that goes on crooked.

These steps suit retail windows. Easy install, easy remove, and no residual let store staff take down a dusty graphic, clean it, and re-hang a poster-level sheet without an installation crew.

Reading the peel specification correctly

Peel strength, where a datasheet states it, is a per-model specification for clean, approved surfaces. Dust or grease on either face sits outside those conditions.

FreePost® Octopus™ is specified to hold on approved indoor surfaces for ongoing use.

Before a complaint is opened as a batch-quality claim, check three things:

- Was the window cleaned? - Was the cling face kept free of dust and handling? - Is the substrate on the approved list?

Quote the exact model number if the case is escalated. Finish and printing compatibility differ by model, so a claim against "Octopus film" in general cannot be traced.

Octopus model data for the four OT variants

The four FreePost® Octopus™ OT models below differ in finish, total thickness, and compatible printing; they are not one interchangeable film.

Source: Scitop Ltd product datasheets for the models listed. https://www.scitop.net

All four use white PP film at about 50 μm face thickness. Indoor use applies to each of these Octopus™ models. Total thickness and the print route differ by model. OT-PP260WW is listed for water-based dye and water-based pigment ink. OT-PP220DW is listed for HP Indigo sheet-fed printing. OT-PP250EW and OT-PP250EWB are listed for eco-solvent, UV roll-to-roll, Latex, and UV offset; OT-PP250EWB adds a grey back layer described as 100% blackout. Do not copy one model’s printer list onto the other three. The sheets are coated and slit on Scitop Ltd in-house lines. Match any reprint to the printer listed for that model.

When cleaning will not restore the cling

If a clean, dry FreePost® Octopus™ sheet on a clean, approved surface still lets go, check the limits below. These limits belong to Octopus™ only.

Acrylic display boards. Octopus™ is not specified for acrylic display boards.

Cling face toward the sun. The cling face must not face the sun.

Creases and wrinkles. Creases and wrinkles affect how Octopus™ applies. Wiping dust does not flatten a crease. Peel at a low angle so the film stays intact. That is an application condition, not a finding that the sheet has permanently failed.

Painted, wood, and panel surfaces. These sit outside the Octopus™ list of clean, smooth, flat surfaces. Do not force this film onto them.

Outdoor use. Octopus™ is specified for indoor use.

Action checklist for store teams

Store staff can run this checklist on site. A poster-level FreePost® Octopus™ change does not require a professional installation crew.

- Read the model number on the roll label or job ticket before troubleshooting. - Peel slowly at a low angle, close to parallel with the surface. - Wipe loose dust from the film with mild soapy water. Clean the substrate thoroughly as well. - Keep fingers off the cling face. Re-hang dry and smooth the sheet flat. - Stay on an approved indoor surface: smooth glass, smooth metal, smooth plastic boards (except acrylic display boards), smooth furniture surfaces, or smooth ceramic tile surfaces. Acrylic display boards, outdoor use, a cling face toward the sun, and painted walls, wood, or textured panels are not approved. Keep the cling side away from direct sunlight. - If creases or wrinkles keep the sheet from lying flat, note that they affect how Octopus™ applies. Cleaning dust will not remove a crease. Do not describe the sheet as permanently failed. - For samples, model selection, or engineering support for a window program, visit https://www.scitop.net and contact the Scitop Ltd application engineering team. OEM/ODM slitting, packaging, and private-label options are available.

References

1. Scitop Ltd. FreePost® Octopus™ product datasheets: OT-PP260WW, OT-PP220DW, OT-PP250EW, OT-PP250EWB. https://www.scitop.net 2. Scitop Ltd. FreePost® Octopus™ product pages. https://www.scitop.net