Purpose
The OKI C651 and C844 are sheet-fed CMYK LED/laser printers. There is no white toner channel and no roll path: you print label sheets (A4/A3/custom) and cut or die-cut them afterwards. This guide covers the sheet workflow in Label Studio Creator: media & tray, imposition, driver color, preflight, and finishing.
It suits office-to-light-production label runs on pre-die-cut label sheets or full sheets cut after printing.
1. Capture the sheet and job parameters
Sheet printing lives or dies on paper size and imposition accuracy. Record these before building the template:
- Sheet size: A4, A3, SRA3, or custom (check the model's max — C844 handles up to banner lengths on bypass).
- Label layout: pre-die-cut sheet grid (e.g. Avery-style) or full-bleed sheet to be cut/plotted.
- Media type & weight: label stock, gloss, synthetic, heavy card.
- Feed source: main tray for standard stock, bypass/manual for thick or synthetic media.
- Margins: the unprintable edge (typically a few mm) — keep die-cut labels inside it.
2. Build the sheet template
New sheet document
Use File > New and pick a sheet/grid template that matches your die-cut sheet, or set a custom grid (rows, columns, pitch, margins).
Match the exact paper size
The document size, the driver paper size, and the physical sheet must all agree, or the grid drifts across the page.
Add crop / cut marks
For full-bleed sheets cut afterwards, enable crop marks so the guillotine or plotter has references.
Save per media
Keep one template per sheet size × label grid × media type so repeat jobs start correct.
3. Design the artwork (CMYK, no white)
Because there is no white channel, design for opaque or white media only — do not rely on white ink for clear stock on these models.
- Work in CMYK; keep small text and barcodes in K-only for crisp edges.
- Use
Tools > Barcode Assistantand validate before printing. - Add bleed only if the sheet will be trimmed; pre-die-cut sheets need none.
- Watch heavy solids — LED toner on gloss can scuff; test durability.
4. Driver & color settings
| Setting | Recommended |
|---|---|
| Paper size | Exactly the sheet you loaded (A4 / A3 / SRA3 / custom). Confirm in both app and driver. |
| Media type / weight | Set label / heavy / gloss so the fuser adapts; wrong weight causes poor adhesion or curl. |
| Feed source | Bypass/manual for thick or synthetic label stock; main tray for standard paper. |
| Color management | Use a consistent ICC path (app-managed or driver-managed, never both) for repeatable color. |
| Quality | Highest quality for fine text/barcodes; draft only for internal proofs. |
5. Preflight before the run
Layout check
Every label inside the printable margin; grid pitch matches the die-cut sheet exactly.
Barcode check
Syntax, check digit, quiet zone, and a scan of a single printed sheet.
Color check
ICC path consistent; K-only where it should be K-only; solids not over-inked.
Registration check
Print one sheet and confirm artwork aligns to the die-cut labels (front/back if duplex).
6. Print one sheet, then the stack
| Check on the test sheet | What to look for |
|---|---|
| Grid alignment | Artwork centered on each die-cut label, no drift toward one edge. |
| Edge margin | No content clipped by the printer's unprintable border. |
| Toner adhesion | Rub test on the actual media; adjust media type/weight if it flakes. |
| Barcode | Live scan on the real stock and finish (gloss can lower contrast). |
7. Cut / finish after printing
Sheet output usually needs finishing. Match the method to the label type:
- Pre-die-cut sheets: just peel — no cutting needed.
- Full-bleed sheets: guillotine to size using crop marks.
- Contour shapes: send to a cutting plotter (see the Cut Contour tutorial) with a registered cut path.
8. Common problems and fixes
| Symptom | Likely cause & fix |
|---|---|
| Artwork drifts across the sheet | Paper size mismatch between app and driver, or scaling on. Set 100% and identical sizes. |
| Content clipped at edges | Design outside the unprintable margin. Pull labels inward. |
| Toner flakes / poor adhesion | Wrong media type/weight; use bypass and the correct heavy/label setting. |
| Colors shift between jobs | Double color management. Pick app- or driver-managed, not both. |
| Jam on thick stock | Feed from bypass and set the correct media weight. |