Barbieri LFP et LFP qb

The Barbieri table is a high-end solution for taking measurements on transparent media, fabrics and thick media up to 2 cm.

Introduction

The Barbieri LFP is compatible with the Calibration & Characterization and Print Control modules.

Product sheet: https://www.barbierielectronic.com/project/spectro-lfp-qb/

USB or Network RJ45 connection

Coraye gives you the possibility to connect your Barbieri LFP spectrophotometer via the USB port or via the RJ45 network connection. First of all, make sure that the Barbieri plugin is installed

pagePlugins installation and management

USB connection

When your Barbieri LFP or LFP qb is connected via usb, it will be detected and displayed at the top right in the Coraye window. You won't have to do anything else.

RJ45 network connection

If you choose to connect your Barbieri LFP or LFP qb to a network via an RJ45 connection, it is necessary to indicate the Barbieri IP address. First step: Retrieve the IP address of the Barbieri: Press the part located at the top right of the touch screen of the measuring head

The IP address appears on the screen

If the IP address does not appear, make sure the RJ45 cable is properly connected to the Barbieri and to the network, then restart the Barbieri

Second step: transfer the IP address in Coraye

Click on the "Enable network instrument detection" button located at the top right of the Coraye window

In the window that appears, enter the IP address of the Barbieri (Ex: 192.168.1.38) then select the model of the spectrophotometer (In our example: Spectro LFP qb). Click on the "Validate" button

Congratulations, your Barbieri spectrophotometer is ready for use.

Creation of an ICC profile

In order to illustrate the use of the Barbieri LFP with Coraye, we will use the icc profile creation module. When the Barbieri LFP table is recognized by Coraye, her name is displayed in the top right corner.

In this example we will measure an IT8.7-4 Random range

From the list of spectrophotometers, select the Spectro LFP qb to convert the staff to the correct format.

But it is also possible to save Presets with personalized parameters.

The test pattern printing conditions depend on the profile you want to achieve, we will not deal with this subject in this tutorial.

However, below is a link to create RGB profiles from a simple driver:

pagePrinting chart RGB

Measurement options

Measurement condition

The Barbieri LFP supports M0, M1, M2 and M3 modes (polarizing filter option).

UV cut filter and Polarization filter The UV cut filter is already included into the instrument and is activated by selecting the M2 measurement condition. The optionally available polarization filter for reflection measurments can be exchanged by simply removing with your finger first the reference white on the spectral unit and then the aperture ring and replacing it with the polarization filter cover. The aperture ring is holding by a magnet:

The M2 measurement condition (UV cut filter) is used to eliminate the effect of optical brighteners. Measurements correspond to measurement condition M2 of ISO 13655:2017 The Polarization filter is used when measuring shiny surfaces. Measurements correspond to measurement condition M3 of ISO 13655:2017

Measuring daylight fluorescent inks Fluorescent inks, as understood here and as used in the printing industry, are inks which absorbe light in UV and visible wavelengths and reradiates at longer wavelengths in the visible spectrum and is manifested as color. This effect occurs already under daylight condition. The Spectro LFP qb is capable of illuminating in daylight condition by using the M1 measuring condition and is therefore capable of stimulating this fluorescent effect. The reradiated light is added to the normal reflected light resulting in spectral curves which exceed the 100% remission. The Spectro LFP qb is capable to automatically expand its dynamic range when using the UpDown mode and is therefore capable of measuring fluorescent inks which exceed by more than 200% the remitted light. Therefore, to correctly measure fluorescent inks:

use the M1 measurement condition
use the UpDown measuring mode
save spectral data into measuring files

Measurement in emissive or reflective mode

Even if the majority of the measurements are carried out in reflection mode, the most interesting possibility of the Barbieri LFP, is to be able to measure media transparently, such as Backlits.

Measuring Aperture

Changing the measuring aperture The Spectro LFP qb spectral unit is equipped with a selectable measuring aperture. The switching occurs automatically by the software driving the instrument (manual switching is supported only in spot mode when spectral unit is used detached from the platform). The aperture size is valid for reflective and transmissive measurements. The selected aperture is indicated on the display. The small aperture corresponds to 2mm aperture, the wide aperture to 8mm. The wide aperture should be used with structured materials or if the print resolution is smaller than 120 dpi. When using the wide aperture, make sure that your target to be measured has patches equal or larger than 10mm. The recommended patch size is as follows: 2 mm aperture: 5 mm or larger 6 mm aperture: 10 mm or larger 8 mm aperture: 12 mm or larger

Recognition of the position of the patches by camera (Text option for LFP qb only)

This option is useful for measuring test marks made on textiles.

When the "TEX" option (textile activation) is activated on the instrument, the detection unit will capture an image of the inserted chart, measure and analyze it and provide information on the size of the graphic, the typical graphic. , graph position, etc.

Recognition of the position of the patches by camera on Barbieri LFP qb

Number of measures per patch

Measuring modes

The Spectro LFP qb supports three measuring modes: 1. Up-Down mode In up-down mode the measuring head of the instrument moves up and down between each measurement. Use this mode for sensitive materials to avoid any scratches on the surface of the target. This mode gives also the most accurate measurements and is used for measuring fluorescent inks. 2. Fast (default) mode Fast measuring mode is the default mode of the Spectro LFP qb. In this mode the measuring head lies on the target and the surface is scanned. 3. Contactless mode The contactless mode is similar to the above fast mode with a difference that the measuring head does not touch the surface of the target. This measuring mode is suitable for sticky and sensitive materials.

Multi page measurement

When the staff contains many patches, it is often necessary to measure several sheets in a row.

Once the measurement is complete, click on "Reading done"

before clicking on "Reading done", remember to save your measurement