Pancyprian Graphic Arts common mistakes
Pancyprian Graphic Arts · Understand the traps and how to avoid them.
Calculating the final printed size by scaling the original dimensions by the reproduction percentage and ignoring that the percentage applies to each axis independently, so a 70% reduction of an A3 sheet is reported as an A4.
Candidates treat 'reduce to 70%' as a single linear adjustment and round the result to the nearest familiar paper size instead of multiplying both width and height by 0.70 and checking the resulting area factor (0.49).
What to do instead
Always compute new width and height separately (W × 0.70, H × 0.70), then verify the area scales by the square of the ratio. Memorise the ISO A-series halving rule (area halves per size step, side ratio 1:√2) and practise converting between percentage reduction and the linear scale factor.
Treating RGB values and CMYK values as interchangeable by entering the same numbers in each mode, then submitting a file whose printed colour does not match the approved proof.
The two are different colour models with different gamuts; candidates convert by typing numbers rather than by assigning an ICC profile and using a perceptual or relative colorimetric rendering intent, and they forget that out-of-gamut RGB colours must be clipped or mapped.
What to do instead
Convert with an explicit profile-to-profile transformation (e.g. sRGB to the press CMYK profile) using relative colorimetric with black point compensation, then soft-proof and compare against a contract proof under a D50 viewing condition. State the rendering intent and profile names in the job notes.
Specifying total ink coverage and black generation without checking the sum of the four channel values, producing a file with TAC above the press limit (commonly 300–340% for coated sheetfed, lower for newsprint and uncoated).
Candidates add rich black to already heavy CMY builds, or convert images without setting a TAC limit in the separation settings, because they think 'more ink means darker black'.
What to do instead
Set a TAC limit in the conversion/separation settings matching the substrate, use GCR/UCR to move density into the K channel, and verify with an ink-limit or total-area-coverage readout before output. Reserve rich black for large solids only, never for small text.
Designing a saddle-stitched or perfect-bound job with creep, gutter allowance and spine width unaccounted for, so inner pages lose margin or the cover artwork wraps onto the spine incorrectly.
Candidates treat the imposed booklet as flat single pages and forget that folded sections push inner pages outward (creep/shingling) and that spine width depends on page count and paper bulk.
What to do instead
Calculate spine width as (page count ÷ 2) × paper bulk (or caliper), add creep compensation per section, and keep critical content inside a defined safety margin from the trim and gutter. Request a folded dummy for anything above roughly 64 pages or on bulky stock.
Confusing screen ruling, halftone frequency and output resolution, e.g. claiming a 300 ppi image must be printed at 300 lpi, or setting a 175 lpi job at 300 ppi without applying the quality factor.
The number 300 appears in both contexts and candidates collapse the two concepts; they also confuse dpi with ppi and with spots per inch on a platesetter.
What to do instead
Use the rule of thumb that image ppi should be about 1.5–2× the halftone ruling at final size (so 175 lpi needs roughly 300–350 ppi), and keep plate/CTP resolution separate from halftone ruling. Recalculate whenever the image is scaled in layout.
Writing health and safety answers that list hazards without controls, or that cite a control in the wrong tier of the hierarchy - for example relying on PPE as the first response to solvent vapour.
Candidates memorise hazard names (VOCs, noise, repetitive strain, solvent dermatitis) but not the hierarchy of control, so they describe the problem rather than the engineered or organisational solution.
What to do instead
Structure every answer as hazard → risk → control, and apply the hierarchy explicitly: eliminate or substitute (water-based or low-VOC inks, automated plate handling), then engineering controls (local exhaust ventilation, enclosure), then administrative (rotation, training, monitoring), with PPE last. Name the specific regulation or exposure limit only if you are certain of it.
Mixing up the finishing and binding terms in a specification - calling a folded-and-stitched booklet 'perfect bound', or describing a gatefold as a roll fold - so the quoted process does not match the requested product.
The vocabulary is learned as a list rather than as physical constructions, and candidates have not handled samples, so they cannot picture how the sheets, signatures and cover interact.
What to do instead
Learn each method by its construction: saddle stitch (wire through the fold, multiples of four pages), perfect bind (milled spine, glued cover, creep-free but with spine width), spiral and wire-o (punching, lay-flat), plus fold types (half, tri-fold/letter, gate, roll, Z). Sketch the cross-section and page-count constraints for each.
Quoting a job from paper cost alone, omitting make-ready waste, plates, ink, finishing, outsourcing and spoilage allowance, so the estimate is below cost and the answer shows no margin.
Candidates focus on the visible material and forget that short runs are dominated by fixed setup costs, and they do not apply a spoilage percentage or distinguish fixed from variable costs.
What to do instead
Build the estimate in layers: substrate (area × basis weight or sheet price × sheets including spoilage), plates and make-ready per forme, running cost per impression, finishing per unit plus setup, then add overhead and margin. Show the spoilage percentage explicitly and state the break-even quantity where relevant.
Describing a web or interactive deliverable in print terms - specifying CMYK, 300 ppi and bleed for a screen asset, or ignoring responsive breakpoints, file weight and accessibility.
Candidates transfer prepress habits directly to digital output and do not consider that screen output is RGB, resolution-independent in layout but pixel-bound in images, and constrained by bandwidth and device diversity.
What to do instead
For screen work specify sRGB or Display P3, appropriately sized pixel dimensions for the intended display densities, compressed formats (JPEG, WebP, SVG for vector), responsive layout behaviour, alt text and contrast ratios against WCAG guidance, and test on representative devices.
Answering quality-control questions by naming a device rather than a measurement: saying 'use a densitometer' without stating what is measured, against which target, with what tolerance and what action follows an out-of-tolerance reading.
Candidates learn instrument names and forget that QC is a closed loop of standard, measurement, tolerance and corrective action; they also confuse density with colorimetric values and with dot gain.
What to do instead
Frame every QC answer as: reference (colour bar, control strip, ISO 12647 target values), measurement (density, dot gain/TVI, LAB, grey balance), tolerance, and corrective action (adjust ink keys, plate curve, or re-proof). Mention a signed-off contract proof and a retained OK sheet as the reference for the run.