What Gum Solution does on a finished plate
Gum solution is a protective coating applied to a clean, processed plate after imaging and final rinse. It forms a thin film that helps guard the plate surface against oxidation, dust, finger marks and light handling damage before the plate goes on press. In everyday press work, that matters when plates are made in batches and held for later use, or when work has to move from plate room to press room and sit for a few days.
For offset plate workflows, this product is used after the plate has been properly developed and washed. It supports cleaner start-up by helping preserve the image area and non-image area condition, which can reduce scumming, spotting and early run instability. It is not a substitute for proper processor settings or good chemistry balance, but it is an important finishing step for many shops.
At LithoPrinting Plates, we supply gum solutions for routine plate protection, storage, and pre-press handling in press rooms that work under heat and dusty industrial conditions. In some plants the plate room is busy all day and the plate can sit on a trolley or shelf for hours, so a proper gum layer is worth the effort.
Sizes and options for different plate rooms
Gum solution is usually supplied as a liquid concentrate or ready-to-use mix, depending on the press room requirement and the processor setup. Some customers want a product for daily manual application, while others need a solution that fits straight into a plate finishing line. We help assess which format is better for your workflow, the plate type and the amount of work handled each shift.
- Ready-to-use liquid for direct application on processed plates
- Concentrated gum for dilution according to the maker's working ratio
- Packs for small rooms up to busy plants
- Options suited to CTP plate finishing and short term plate storage
- Compatible with manual wipe, sponge or processor-assisted gum stations
Most customers order by pack size rather than by plate count, because consumption changes with plate size, image coverage and storage time. A 20 litre pack may suit a smaller commercial printer, while a larger plant in Johannesburg or Pretoria may want 200 litre supply planning to match weekly plate output. We can assist with supply planning so you are not caught short mid-week.
Best uses for this gum
Gum solution suits offset litho plate rooms, CTP workflows and print finishing departments that need stable plate condition between imaging and press start. It is useful for commercial printers, label plants, packaging operations and finishing lines that keep plates in rotation over several shifts. In humid weather, it can be especially useful because plates can pick up moisture quicker than expected.
It is a practical fit where plates are:
- Stored overnight before mounting on press
- Handled between imaging and press fitment
- Moved between a plate room and a separate production floor
- Used in high dust or higher temperature environments
- Needed for stable start-up after a long press stop
Good plate protection also helps when a job needs to be repeated after a delay. The plate surface stays easier to handle and the first sheets can come up cleaner, provided the rest of the process is in order. It does not fix a badly washed plate, but it does help protect the work already done.
Application, handling and basic installation needs
Gum solution goes on with your normal gumming unit or a clean sponge. It is applied in the plate room or near the processor using manual tools or a gum station, depending on your setup. For most installations, the main requirement is clean working space, a suitable tray or feed point, and staff who know the order of plate finishing steps. Work in a ventilated spot out of direct sun.
Typical handling is straightforward:
- Use on fully processed and rinsed plates
- Apply evenly across the plate surface
- Allow the plate to dry before storage or mounting
- Cap the container between uses
- Do not mix with unrelated chemistry unless advised
Where a processor or plate finishing line is already in place, we can advise on flow and compatibility with the current wash programme. If your plant runs a mixed schedule with different plate sizes, it helps to agree the application method before the plates start moving through the room. Small procedure tweaks cut remakes.
Care, storage and service support
Gum solution should be stored upright in its original container, in a cool dry place, and away from direct heat or open flame. In South African industrial areas, especially around Johannesburg and Germiston, storage conditions can shift quickly during summer, so it is sensible to keep the product in a room that does not swing too hot during the day. Once opened, containers should be closed properly after use to reduce contamination and evaporation.
For service support, LithoPrinting Plates assists with chemistry balancing, plate handling training and production troubleshooting. If your plates are drying too fast, marking during storage, or showing uneven start-up, we can look at the process as a whole rather than only the gum. The issue may sit with rinse quality, processor speed or blanket condition and not the gum itself.
We also help with blanket assessment and press startup help, because the plate and press side work together. A clean plate is one part of the job, but if the press is off colour or the water settings are out, the final result will still suffer.
Matching gum to your plates
Before placing an order, it helps to confirm a few details so the gum solution suits your plates and production pace. That avoids buying a product that works in principle but not in your actual room. If you are based in Roodepoort, Randburg, Midrand, Pretoria or around City West, we can still arrange nationwide supply and advise by phone or message.
- Plate type and supplier specification
- Whether you need concentrate or ready-to-use product
- Daily plate volume and storage time
- Manual application or processor-assisted use
- Current wash programme and rinse quality
- Pack size needed for your monthly consumption
It also helps to know if your plant has long overnight storage or frequent press stoppages. Those conditions often call for tighter plate care and more careful gum handling. If you are unsure, send the plate details, the press format and the volume you run each week, and we will match the product to the job.
Key facts
| Product type | Protective gum solution for finished printing plates |
|---|---|
| Use | Plate finishing, storage protection and stable press start-up |
| Format | Ready-to-use or concentrate, depending on workflow |
| Application | Manual wipe, sponge or processor-assisted gum station |
| Storage | Cool, dry area in sealed container |
| Support | Nationwide supply from Industria West, Johannesburg |
