Swatches
Substrate Check
A practical note on checking vinyl, banner or film before the ICC profile gets blamed for a media issue.
A profile only works properly when it matches the actual roll on the printer.
Substrate Check starts with the roll, not the RIP. Before an ICC profile is questioned, inspect the label, face stock, backing and coating so the loaded settings suit the actual media on the printer.
Roll details checked first
- Media code and width verified
- Face film and liner photographed clearly
- Coating, finish and intended application noted
- Printer, ink set and heater settings listed
Check the media against the matching profile note before changing colour settings. A solvent banner profile loaded onto a coated film, or a vinyl profile used on the wrong calendered stock, can produce faults that look like colour trouble but begin with the roll itself.
How Substrate Check matters on banner and vinyl jobs
Substrate Check is a reminder to inspect the material before blaming the profile. Vinyl, banner and film problems often start with the substrate itself, not the ICC settings loaded for the job.
Start with what is physically on the machine and what the job needs to do after printing. Banner for outdoor pole pockets, self-adhesive vinyl for shop windows, PET film for lightbox work and paper for short-term indoor use all behave differently in Johannesburg dust, Durban humidity and Cape Town winter damp.
Inspect the first metre before a full run is sent. Edge curl, telescoping on the roll, loose winding, damaged cores and inconsistent surface sheen are early warnings that the substrate may not match the profile or the pass settings chosen for the job.
Checks recorded for loading
A proper substrate note should identify the media plainly enough that the same roll can be recognised later. Record width, finish, adhesive type where relevant, printable side, and whether the material is meant for indoor graphics, outdoor banners, decals or backlit work.
Use Substrate Check before comparing Profiles or machine notes under Presses. Then review related samples in Swatches and send the roll marking through the contact form if the coating or finish is uncertain.
- Actual roll checked before profile swap
- Printable side confirmed before loading
- Photos and roll label kept together
SA print room variables
Imported media can arrive with different batch markings, alternate liners or revised coatings even when the trade name looks familiar. That matters on FastJET, Stormjet and Skywalker units where heater balance, feed compensation and vacuum settings may need checking again after a media change, especially when stock moves through Johannesburg depots or down to Durban and Cape Town by courier.
Coastal moisture can soften some papers and films before printing begins. Inland dust can contaminate adhesive edges and attract static on lighter film stocks, while winter mornings and load-shedding interruptions can change how a roll settles on the machine before the first test strip is read.
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Questions to answer on media
A practical note on checking vinyl, banner or film before the ICC profile gets blamed for a media issue.
Write down what the substrate is, what it is for, and how it was loaded while the sample is still at hand. That record helps when a banner shows strike-through, a vinyl silvering issue appears after application, or a film prints well on one batch but not on the next.
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