Estimating and imposing digital roll labels: frames, clicks and lane changes

A label order used to be one design and a long run. Now it is often six flavours of jam, 500 to 4,000 of each, on a digital press, with a price wanted by lunchtime. The sums aren't hard, but there are a lot of them, and half the inputs are hidden in the artwork or decided by how the labels sit on the web.

Many SKUs, one web

A narrow-web press prints lanes side by side, one label wide, then the web is slit and each lane rewound into rolls. With six SKUs, every layout decision changes the price: which SKU runs down which lane, whether a lane can move on to the next, what lanes that finish early print, and how the press counts it.

How digital label presses charge

Press	Prints	You pay for	Speed
HP Indigo 6K	Frames up to 980 mm	Clicks: by common trade understanding, one per separation per frame	30 m/min CMYK, 40 in EPM, 60 with 1 or 2 colours
Konica Minolta AccurioLabel 400	Frames up to 1,294 mm	A click per metre of web, reported to include consumables	39.9 m/min CMYK, 20 with white
Xeikon dry toner, single-pass UV inkjet	A variable repeat	Toner or ink, by coverage	Xeikon CX300: 30 m/min whatever the colours

HP publishes no label click definition or price. One click per separation per frame is how shops and the trade press describe it, and the model used here. Under it a half-filled frame costs as much as a full one. No maker publishes click rates or ink costs: they come from your own contract.

What the artwork decides

On an Indigo, clicks are separations × frames, and the separations are in the artwork, not on the order:

• White. Clear or metallic film usually needs a white underprint: CMYK plus one hit of white is 5 separations, two hits for opacity make 6.
• Spot and extended-gamut inks. Each orange or violet is one more per frame.
• EPM. HP's Enhanced Productivity Mode builds black from CMY: 3 separations, 25 % fewer clicks than CMYK, and faster, for artwork without a critical black.
• Black. Black and one spot can run as 2 separations; build the black as rich black and it is 5.
• Technical inks. A die line saved as a spot colour is a separation in the file that never prints.

Separations set the speed too. An Indigo prints one at a time: HP's 30, 40 and 60 m/min for 4, 3 and 2 colours fit 120 ÷ separations, so 5 run at about 24 and 6 at 20 (worked out, not published). On a per-metre press white adds no clicks but can halve the speed. On ink-charged presses coverage is the cost, and a white underprint covers nearly the whole label.

Where manual estimates go wrong

• Frame fill. Rows per frame is the frame ÷ the label pitch, rounded down: a 4 in label with a 1/8 in gap fits nine rows, 943 mm of a 980 mm frame.
• The longest lane sets the run, rounded up to whole frames, not the total quantity ÷ labels per frame.
• Lanes that finish early print blanks or overs. Six SKUs on four lanes need a second run or lane changes.
• Changeovers. A lane that moves on to the next SKU needs a few blank or separator labels for the finishing line.
• Makeready web costs clicks on an Indigo. Only Domino publishes a figure (under 2 m per stop or substrate change); use your own press log.
• Rolls. Fixed-count rolls go to lanes whole and a changeover starts a new roll, so the roll size can add a frame.

A worked example: six jam labels

Larkfold jam labels, 3 × 4 in (76.2 × 101.6 mm), 3 in across the web, on an HP Indigo 6K-class press: 980 mm maximum frame, 320 mm print width. Strawberry 4,000, Raspberry 3,000, Apricot 2,000, Blackcurrant 1,500, Marmalade 1,000 and Lemon curd 500: 12,000 labels.

Four lanes with 1/8 in gaps take 314.3 mm across (five would take 393.7). Nine rows fit a frame: 36 labels. With lane changes and 3 changeover labels the lanes finish together at 3,006 rows, 334 frames: Strawberry fills lane 1 and the top of lane 2, Raspberry and Apricot follow down lanes 2 and 3, and Blackcurrant, Marmalade and Lemon curd share lane 4. There are 24 blank labels, 12 at changeovers, and the frames PDF has just 9 different pages.

The rates are example inputs, not anyone's price list: 15 m and 15 minutes of makeready, 30 m/min in CMYK falling per separation, $0.04 a colour click and $0.06 a white click. The web is 315.0 m plus 15 m of makeready, which counts as 16 more frames of clicks.

334 frames, 330 m	EPM (3)	CMYK (4)	CMYK + white (5)	CMYK + 2 white (6)
Clicks	1,050	1,400	1,750	2,100
Speed	40 m/min	30 m/min	24 m/min	20 m/min
Press time	23.2 min	26.0 min	28.7 min	31.5 min
Clicks at example rates	$42	$56	$77	$98

Planned by hand with one SKU per lane, the same job needs two runs: Strawberry and Raspberry over two lanes each, then the other four one lane each.

CMYK + white	One run, lane changes	Two runs, one SKU per lane
Frames	334	446
Web	330.0 m	450.6 m
Clicks	1,750	2,390
Blank labels	24	4,056
Press time	28.7 min	48.8 min

The second run is as long as Apricot's 2,000, so Lemon curd's lane prints 1,500 blanks after its 500. Lane changes save a makeready, about 120 m of web, 640 clicks and 20 minutes. Rolls of 500 add one frame (335, with 60 blanks) because whole rolls go to lanes. On an AccurioLabel 400-class press charged per metre, 12 rows fit its frame: 251 frames, 330.6 m, and white adds no metres but takes the running time from 8.3 to 16.5 minutes.

How AutomatePrint does it

The press, once. In Equipment, a roll-fed digital press is a label press. Presets for the HP Indigo 6K and V12, Xeikon, Konica Minolta AccurioLabel, Screen, Durst, Epson, Canon, Domino, Gallus One and Mark Andy fill in the widths, frame, stations, speeds and charge model, each with its source. You add your slitter's lanes, makeready web and time, and your prices: clicks per frame (colour and special) or per metre, ink per m², hourly cost and rate. Speed falls with each separation covers multi-shot presses; a second speed covers presses that slow for white. Test estimate prices any frames and separations on the press's page.

The wizard. Labels on a roll takes the label, counts and gaps (or a die from your library), and Press and rolls picks your default label press with its frame. More lanes than the slitter cuts, or labels wider than the press prints, is flagged before the job exists.

Label lanes. It fills each frame with as many rows as fit (or whole die repeats for an inline full-rotary die). With Change orders within a lane, a lane runs the next item after Changeover labels that can read "Next:" with the item and quantity. You give Separations per frame and how many are white or special, and the page shows the run on your press: frames, clicks or ink by printed area, the web with makeready, substrate area, speed, time, cost and price. Rolls come from labels per roll or a maximum diameter, in the customer's wind position. It writes a frames PDF (one page per run of identical frames, or every frame), a run list and a roll list, and the API's labels/ endpoint returns the same plan and estimate.

Counting separations. Prepress's Separations sidebar lists every plate, marks spot and technical plates, and shows the page as printed, so a white knockout or a die line saved as a spot shows before you type the count.

Quoting it before the job exists

The same planning runs inside a quote. In Estimating, add a sized part on label stock (a roll stock priced per MSI, per ft² or per m²) with the label size, quantity and inks, and it moves to the Digital label press route on its own. Inks set the separations: 4/0 is CMYK, 4+White/0 is five separations with one special. The Production tab works out the lanes from the roll width and the press’s print width and slitter, fills frames, adds the finisher’s waste and spoilage, and prices the press (clicks or ink, time, makeready web), the stock the web uses, the finisher and the cores.

A worked quote with example rates: 10,000 labels of 4 × 2 in, CMYK and white, on a 13 in roll and a 980 mm-frame press. That is 3 across × 18 around, 190 frames with 2 % spoilage, 1,030 clicks including the makeready web, 199.6 m of web at 24 m/min and about 18 minutes on press. With $0.05 colour and $0.08 white clicks, $90 an hour and stock at $0.60 per MSI, the press is $85.15, the stock $61.29 (102.15 MSI) and the line $146.44, about 1.5 cents a label. Flexo label presses aren’t quoted yet; give those a custom price.

See Roll labels on a digital label press for the options and what blocks a price.

What you still decide

• Every rate, because makers don't publish them.
• Makeready web and minutes, and the changeover labels your finisher needs.
• Spoilage: Label lanes prints the quantities you give it, so add your allowance.
• Coverage: ink by area uses your cost per m² at usual coverage; a flood of white costs more.
• Unpublished speeds: an Indigo 6K above 4 separations, a V12 above 6 inks (enter 60 m/min).
• The substrate, priced as the job's material, not in the press estimate.

Checklist: a multi-SKU label quote

1. Set up the label press: frame, print width, slitter lanes, speeds, charge model and your rates.
2. Count the separations: white hits and spots, not technical inks. Decide EPM or CMYK.
3. Check rows per frame and what's left of the frame.
4. Allow lane changes and set the changeover labels.
5. Compare against one SKU per lane, and check what the roll size adds.
6. Add spoilage, then check frames, web, clicks and time against a similar past job.

See AutomatePrint imposition, or read label lanes and setting up a label press.