An OCA machine is a vacuum laminator that bonds new cover glass to a working phone display using OCA (optically clear adhesive) film, so a shop can replace cracked glass without replacing the whole, far more expensive display. On its own it is only one part of the job: glass-only refurbishment also needs a separator to remove the cracked glass, tools to strip the old adhesive, a bubble remover (a heated pressure chamber, often called an autoclave), and a clean, dust-controlled workspace. For repair shops with a steady flow of expensive OLED or curved screens, it can recover displays that would otherwise be replaced. For low-volume shops, the equipment cost, learning curve and failure rate usually make buying complete replacement screens the better business choice. This guide explains the equipment, the process and how to decide.
What is OCA?
OCA is a thin, clear, double-sided adhesive film used to bond the layers of a display stack. Unlike liquid adhesive, it has a uniform thickness and no liquid to seep, which makes it suited to flat screens processed in volume. The alternative, LOCA (liquid optically clear adhesive), is cured with UV light, as explained in the Wikipedia article on UV curing, and is often used for curved screens or uneven surfaces. Our article on incell screens explains how different display stacks are built.
The equipment for glass-only refurbishment
| Equipment | Job | Notes |
|---|---|---|
| Separator machine | Heats the screen on a plate so the cracked glass can be cut away from the display with a fine wire | Vacuum plates hold the screen; some setups use freezing instead of heat |
| Cutting wire | Slices through the old adhesive layer | Fine molybdenum or similar wire is common |
| Glue removal tools | Strip remaining adhesive from the display surface | Glue remover solutions, plastic scrapers, rotating removal tools |
| Dust-free cleaning area | Prevents dust being trapped under new glass | Clean bench, dust-free cloths, anti-static measures |
| Alignment moulds | Hold glass and display in exact register | Model-specific moulds |
| OCA vacuum laminator | Presses OCA, glass and display together under vacuum | The "OCA machine" itself |
| Bubble remover (autoclave) | Applies heat and pressure to push out residual air bubbles | A pressure vessel; must be used safely |
| UV curing lamp | Cures LOCA or edge adhesives | Needed for LOCA workflows |
| Polariser equipment (optional) | Replaces a damaged polariser film on LCDs | Advanced; not every shop needs it |
Some manufacturers sell all-in-one machines that combine a laminator and bubble remover, and kits marketed for curved-edge screens. The Wikipedia article on autoclaves explains the principle behind pressure chambers, and the article on polarisers explains the film layer that sits on LCD panels.
How glass-only refurbishment works
- Test the display: fit the cracked screen to a test phone or tester and confirm the display and touch work. Refurbishing a dead panel wastes materials.
- Remove the frame if the screen is supplied in one, and protect the flex cable.
- Separate the glass: heat the screen on the separator plate, then pull the cutting wire through the adhesive layer between glass and display, steadily and evenly.
- Remove the old adhesive: soften and scrape the remaining adhesive off the display without scratching the polariser.
- Clean thoroughly: remove every speck of dust in a clean area.
- Prepare the new glass: peel one side of the OCA film and apply it to the glass (or display, depending on method), avoiding trapped dust.
- Align: place display and glass in the model-specific mould.
- Laminate: run the vacuum lamination cycle to press the layers together.
- De-bubble: place the screen in the bubble remover for a heat and pressure cycle according to the machine and adhesive instructions.
- Inspect and test: check for dust, bubbles, misalignment and touch function, then refit the frame if needed.
Curved-edge OLED screens are more demanding: they need curved moulds, and LOCA or special OCA processes are often used along the curves.
What drives OCA machine prices?
We do not quote machine prices here because they vary widely by brand, size, import route and specification, and they change frequently. The main cost drivers are:
- Size range: machines that handle tablets as well as phones cost more.
- All-in-one vs separate units: combined laminator and bubble remover units save space but concentrate risk in one machine.
- Curved screen capability: curved-edge kits and moulds add cost.
- Build quality: vacuum pump quality, plate flatness and temperature control affect results.
- Support and spares: UK-based support and available spare parts matter when a machine fails mid-week.
- Ongoing consumables: OCA film, glass, cutting wire, glue remover and moulds are a running cost.
When comparing models such as those searched for by brand name, compare the specifications above and the after-sales support, not just the headline price.
Does it make business sense?
When OCA refurbishment can pay off
- You see many expensive screens where only the glass is cracked.
- You have space for a clean, dedicated refurbishment area.
- A team member can spend time learning and practising.
- You can source quality glass and OCA reliably.
- You have a plan for screens that fail during refurbishment.
When buying replacement screens is better
- Low volumes of glass-only damage.
- Mostly LCD phones, where complete replacement screens are inexpensive.
- No space for a clean area.
- You need predictable turnaround and quality without a learning curve.
A worked example, clearly hypothetical: if a shop sees only two or three high-value glass-only cracks a month, the time to learn, the cost of consumables and the screens lost to failed attempts may outweigh the savings for a long time. A shop seeing many such repairs each week is in a very different position. Run the numbers with your own volumes and local prices before buying. Our guides on starting a mobile phone repair business and the repair shop owner resource hub cover equipment planning.
Setting up a refurbishment area
The equipment is only as good as the environment around it. Dust is the main enemy: a single speck trapped under new glass creates a visible spot and a rejected screen. A practical layout:
- Separate the dirty and clean stages. Separation and glue removal create debris; keep them on a different bench from cleaning and lamination.
- Control dust: a small enclosed clean area, a dust-free cloth supply, and limited foot traffic help more than expensive extras.
- Use anti-static measures: anti-static mats and wrist straps protect displays and reduce dust attraction.
- Good lighting: bright, even light and magnification make dust and scratches visible before lamination.
- Ventilation for glue removers and solvents.
- Stable power and space around pressure equipment for safe operation.
Training and practice
Glass refurbishment has a real learning curve. Most technicians need many practice screens before they get consistent results. A sensible approach:
- Practise separation and adhesive removal on scrap screens with dead displays.
- Move on to laminating glass to scrap displays and inspecting the results.
- Record each attempt: model, settings, and any defects such as dust, bubbles or misalignment.
- Only take customer screens once your reject rate on practice screens is consistently low.
- Start with flat screens before attempting curved-edge models.
Quality control checklist
- No dust spots visible under bright light at several angles.
- No bubbles after the de-bubbling cycle.
- Glass aligned evenly with the display on all edges.
- Touch responds across the whole surface, including edges and corners.
- No polariser scratches or marks.
- Display shows no new lines, pressure marks or discolouration.
- Screen fits its frame or the phone without lifting.
Keep rejected screens and note why they failed. Patterns in the rejects usually point to one stage of the process that needs attention. Review them weekly while you are learning, then monthly once results are stable. If you also buy parts in, our wholesale phone parts supplier checklist helps you compare suppliers of glass and replacement screens.
Safety in an OCA workshop
- Pressure vessels: bubble removers operate under pressure. Follow the manufacturer's instructions, never open under pressure and maintain seals. The HSE's pressure systems guidance explains employers' duties for equipment that contains pressurised gas.
- Chemicals: glue removers and solvents need ventilation, gloves and eye protection. The HSE's COSHH guidance covers hazardous substances at work.
- Cutting wire: fine wire under tension can cut fingers; wear cut-resistant gloves.
- Heat: separator plates are hot; keep a clear work area.
- Broken glass: collect and dispose of glass fragments safely.
- UV: protect eyes and skin from UV lamps.
Offering refurbishment as a service
Once the process is reliable, glass-only refurbishment can be offered in two ways. Some shops use it internally, fixing customer screens where only the glass is cracked and passing on part of the saving. Others refurbish screens for other repair shops. Whichever route you choose, be transparent: tell customers that the glass has been replaced on their existing display, state your warranty clearly, and explain that water resistance cannot be guaranteed after any screen repair. Our article on phone water resistance after repair explains what to tell customers.
Common mistakes
- Refurbishing untested displays. Always test first.
- Dust contamination, the most common cause of rejects.
- Uneven separation, which cracks the display or tears the polariser.
- Scratching the polariser while removing old adhesive.
- Skipping the de-bubbling cycle or running it at the wrong settings.
- Buying the cheapest machine without support or spares.
- Underestimating the learning curve, and practising on customers' screens.
- Ignoring consumable quality: cheap glass or OCA film with poor clarity or adhesion undoes careful work, so buy from consistent suppliers.
How to make an OCA bubble remover?
Some people search for how to build their own bubble remover. We do not recommend it. A bubble remover is a heated pressure vessel; a home-made one can fail dangerously, and the HSE guidance on pressure systems applies to workplace equipment. Buy a purpose-built unit with proper safety valves and instructions.
Basic tools still matter
Even with a full refurbishment line, everyday repairs rely on simple tools: screwdrivers, opening picks, pry tools and SIM pins. Our 10 in 1 Repair Kit includes 4 screwdrivers, 2 teardown rods, 1 chuck, 2 triangle pry tools and a SIM eject pin, according to the product listing, and is listed at £0.99 (price checked on 15 October 2026; check the product page for the current price). It is handy as a spare bench kit or for trainees.
For more tools and adhesives, see our repair tools and adhesive collection and the best professional phone repair tool kits for 2026.
Frequently asked questions
What is an OCA machine?
A vacuum laminator that bonds new cover glass to a working display using optically clear adhesive film, used in glass-only screen refurbishment.
How do I use an OCA machine?
Test and separate the screen, remove old adhesive, clean, apply OCA to the new glass, align in a mould, laminate under vacuum, then de-bubble in a pressure chamber and test. Follow your machine's settings for time, temperature and pressure.
How much does an OCA lamination machine cost?
Prices vary widely by size, features and supplier. Compare capabilities, support and consumable costs as well as the purchase price.
Do I need a bubble remover as well?
Usually yes. Lamination alone often leaves small bubbles that the pressure cycle removes.
Can OCA refurbish curved screens?
Yes, with curved moulds and suitable processes, but curved screens are harder and have higher reject rates while you learn.
Is OCA refurbishment worth it for a small shop?
Only with enough high-value glass-only repairs. Otherwise, fitting complete replacement screens is simpler and more predictable.
The bottom line
An OCA machine lets a repair shop replace only the cracked glass on valuable displays, but it is one part of a complete process that needs separation, cleaning, lamination and de-bubbling equipment, a clean workspace and practice. It pays off when you have steady volumes of expensive screens with cracked glass; otherwise, complete replacement screens are the better choice. Assess your monthly volume of glass-only repairs, cost the full equipment set and consumables, and plan training time before buying.
