To optimitize the use of the bleams, it is essential to know what to respect in the bleam printing process.

Minimal dimensions

It depends on the device that reads and the distance that separates it from the aimed bleam.

Example:

• we have already printed some few µ-meters long bleams (that were easily read with a microscope)
• with a smartphone that can manage the camera focus : 11 mm (under the condition that the bleam is printed/engraved at a very good quality. If the bleam is visible on an a standard computer screen, we should apply around 2 or 3 cm instead)
• with a mobile phone including a fixed focal length (low cost devices, and many tablettes) : 30 mm
• with some smartphones having a macro lens : 5 mm and less
• with a SPOT type satellite : 1 km

To summarise : between 0.000001 and 1000 meters depending on the context.

Example with an Android Samsung A50 smartphone:

• A 1cm diameter bleam can be scanned at 25cm

• A 15cm diameter bleam can be scanned at 5-6m

• A 15cm diameter bleam can be scanned at 7-8m (photo mode in the Ubleam app)

• A 1cm long QR code can be scanned at 10-15cm

Minimal contrast

It completely depends on the context and the device

• on a downloaded perfect image on Fusion, read with the photo mode, we can have some very low contrasts, almost imperceptible by the human eye.
• if we read it in a closet or in the back of badly lighted workshop, a black bleam printed on some white paper might not be contrasted enough.

Resolution

The central point here is to adjust the resolution of the device that prints/engraves/displays and the size of the bleam we want

• if I want to display a 2.54cm bleam on a screen in 96 dpi, I need a 96x96 px² bleam
• if I want to print a 1.27cm bleam at a photo quality on an inkjet printer, I need a 600x600 px² bleam

Delivering bleams to printers

• 1 bleam per PDF file

We generate a PDF file per bleam to print.
Therefore, if you have 25,000 bleams to print, it would mean 25,000 PDF file containing one bleam each.

• 1 PDF file for all the bleams

We generate one single PDF file gathering all the bleams, with 1 bleam per page.
So if you have 25,000 bleams to print, it would mean 1 PDF file with 25,000 pages containing one bleam each.

Specifications for printing the bleam & logo

Printing on sticker

• Model

The bleam model must integrate a pixellised logo in 300 dpi for having a very good definition.

On the bigger formats, ihaving the logo sent to Ubleam at the right dimensions in 300dpi is preferable.

For the CMYK printing, the logo must sent to Ubleam for it to be inserted inside the bleam.

• Printing types

Engraving

• Model

The bleam model must be recreated because the final file must be in a vectorial format.

The logo must be sent in a vectorial format (SVG, AI or PDF).

• Printing types