{"id":92,"date":"2023-11-30T07:26:35","date_gmt":"2023-11-30T07:26:35","guid":{"rendered":"https:\/\/www.inova-visionlab.eu\/?p=92"},"modified":"2026-01-13T11:02:47","modified_gmt":"2026-01-13T11:02:47","slug":"luti-the-gentle-light-converting-paper","status":"publish","type":"post","link":"https:\/\/www.inova-visionlab.eu\/en\/luti-the-gentle-light-converting-paper\/","title":{"rendered":"LUTI* \u2013 the light converting paper"},"content":{"rendered":"

[et_pb_section fb_built=”1″ admin_label=”Header” _builder_version=”4.23.4″ _module_preset=”default” collapsed=”off” global_colors_info=”{}”][et_pb_row _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.23.4″ _dynamic_attributes=”content” _module_preset=”0bc36438-64f8-4e9e-b190-f24e075df2a6″ text_text_color=”#FFFFFF” text_font_size=”3em” text_line_height=”1.3em” header_text_color=”#FFFFFF” header_2_text_color=”#FFFFFF” header_3_text_color=”#FFFFFF” custom_margin=”||10px||false|false” global_colors_info=”{}”]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IiIsImFmdGVyIjoiIn19@[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ text_font=”||on||||||” text_font_size=”1.4em” global_colors_info=”{}”]*Intellectual property, all rights reserved to INOVA, Matja\u017e Mihel\u010di\u010d s.p. Patent No. P 2023 0 0108 <\/em>
\nLUTI is a trademark registered at EU level and relates to a paper which normalises the reflection of artificial light, the effect being achieved by means of a dye extracted from the Tagetes erecta plant.<\/em>[\/et_pb_text][et_pb_text _builder_version=”4.23.4″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ global_colors_info=”{}”]<\/p>\n

The project LUTI<\/h2>\n

[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”default” text_font=”|700|||||||” text_font_size=”1.4em” text_line_height=”1.4em” global_colors_info=”{}”]<\/p>\n

We have developed the first dedicated eco-friendly paper for artificial light conversion on the market. The dye used is based on the Tagetes erecta plant, which efficiently harmonizes the spectrum\u00a0of artificial light sources. This innovation will potentially have an impact on well-being and general health, and it is ecological. LUTI paper is suitable for all paper media, including paper notebooks in wide daily use. The first notebooks of the experimental series were produced in summer 2023 and are available from INOVA’s office.\u00a0 The companies involved in the project are listed below.<\/strong><\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ global_colors_info=”{}”]<\/p>\n

Description<\/h2>\n

[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”default” text_font=”||||||||” text_font_size=”1.4em” text_line_height=”1.4em” global_colors_info=”{}”]The spectrum of artificial light sources has a significant impact on the human visual system and human physiology in general. In particular, LED lighting emits disproportionate levels of short-wave (blue) light, with some consequences:<\/p>\n

– Disturbing circadian rhythms
\n– Affects cognitive functions<\/p>\n

Many studies have shown that disproportionate amounts of blue light, especially when exposed at inappropriate times, have a significant impact on sleep, performance and mood.<\/p>\n

In addition to its presence in computer screens, LED technology has also become the dominant lighting method in homes, offices and schools. Unlike working on a computer, however, we do not usually look directly into these light sources, but they are reflected off surfaces – and a very common example of receiving a lot of reflected light is writing on white paper in schools or offices.[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ global_colors_info=”{}”]<\/p>\n

The solution to reflected light from paper<\/h2>\n

[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”default” text_font=”||||||||” text_font_size=”1.4em” text_line_height=”1.4em” global_colors_info=”{}”]<\/p>\n

We tested different shades of paper paint to see what would make the most physiological composition of the light that otherwise comes from an LED light source and is reflected from the paper to our eyes. We discovered a yellow-orange colour derived from dried leaves of Tagetes erecta.<\/strong> We coloured the paper with a special preparation of the pigment contained in the plant.\u00a0 Tagetes leaves contain lutein, which plays a remarkable role in human and animal retinas and is known for its blue light absorption properties. In our measurements, this tint has been shown to absorb blue light very well and to have better properties in terms of glare than commercial yellow paper. It was also very well received by the test subjects because of its pleasant soft yellow tint.<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/Screenshot-2023-09-10-at-09.59.09.png” title_text=”Screenshot 2023-09-10 at 09.59.09″ show_in_lightbox=”on” use_overlay=”on” overlay_icon_color=”#000000″ hover_overlay_color=”RGBA(255,255,255,0)” hover_icon=”||fa||900″ align=”center” _builder_version=”4.22.1″ _module_preset=”default” background_enable_color=”off” box_shadow_style=”preset4″ box_shadow_horizontal=”0px” box_shadow_vertical=”0px” box_shadow_color=”rgba(0,0,0,0.05)” locked=”off” global_colors_info=”{}” transform_styles__hover_enabled=”on|hover” transform_scale__hover=”90%|90%” transform_scale__hover_enabled=”on|hover” transform_translate__hover_enabled=”on|desktop” transform_rotate__hover_enabled=”on|desktop” transform_skew__hover_enabled=”on|desktop” transform_origin__hover_enabled=”on|desktop” box_shadow_spread__hover=”30px” box_shadow_spread__hover_enabled=”on|hover”][\/et_pb_image][et_pb_text _builder_version=”4.24.2″ _module_preset=”default” custom_margin=”||12px|||” global_colors_info=”{}”]<\/p>\n

White 4 \u2026\u00a0 Standard paper 80 g\/m2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 YL4A \u2026 LUTI paper 80 g \/ m2<\/span><\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

Figure 1.<\/strong> Spectral reflectance of the LUTI paper compared to standard white office paper; light spectrum is normalized<\/span><\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/Screenshot-2023-09-10-at-09.59.17.png” title_text=”Screenshot 2023-09-10 at 09.59.17″ show_in_lightbox=”on” use_overlay=”on” overlay_icon_color=”#000000″ hover_overlay_color=”RGBA(255,255,255,0)” hover_icon=”||fa||900″ align=”center” _builder_version=”4.22.1″ _module_preset=”default” background_enable_color=”off” box_shadow_style=”preset4″ box_shadow_horizontal=”0px” box_shadow_vertical=”0px” box_shadow_color=”rgba(0,0,0,0.05)” locked=”off” global_colors_info=”{}” transform_styles__hover_enabled=”on|hover” transform_scale__hover=”90%|90%” transform_scale__hover_enabled=”on|hover” transform_translate__hover_enabled=”on|desktop” transform_rotate__hover_enabled=”on|desktop” transform_skew__hover_enabled=”on|desktop” transform_origin__hover_enabled=”on|desktop” box_shadow_spread__hover=”30px” box_shadow_spread__hover_enabled=”on|hover”][\/et_pb_image][et_pb_text _builder_version=”4.22.1″ _module_preset=”default” custom_margin=”||12px|||” global_colors_info=”{}”][\/et_pb_text][et_pb_text _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

Figure 2. Alteration of the 6000 K LED light spectrum (orange) reflected from LUTI paper (magenta)<\/span><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.24.2″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ global_colors_info=”{}”]<\/p>\n

The benefits of the LUTI paper:<\/h2>\n

[\/et_pb_text][et_pb_text _builder_version=”4.24.2″ _module_preset=”default” text_font=”||||||||” text_font_size=”1.4em” text_line_height=”1.4em” global_colors_info=”{}”]<\/p>\n

    \n
  • Workbooks, notebooks, books for schoolchildren – besides the more physiological light spectrum, the yellow background is known to enhance the learning effect<\/span><\/li>\n
  • Ecological and healthy product \u2013 an unprecedented aspect in paper industry<\/span><\/li>\n<\/ul>\n

    Dr. Matja\u017e Mihel\u010di\u010d, M.Sc. optometrist,\u00a0 \u00a9 Matja\u017e Mihel\u010di\u010d;\u00a0 INOVA, Matja\u017e Mihel\u010di\u010d s.p. All rights reserved<\/em><\/p>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.3″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n

    Innovation That Stands Out:<\/b><\/h2>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.1″ _module_preset=”default” custom_css_main_element=”display:flex;” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2026\/01\/Okoljska-nagrada_ang_.jpg” _builder_version=”4.27.3″ _module_preset=”default” title_text=”Okoljska-nagrada_ang_” width=”50%” show_in_lightbox=”on” hover_enabled=”0″ sticky_enabled=”0″][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.24.2″ _module_preset=”ba9fc762-149c-42d5-a408-9fed9968ecb9″ global_colors_info=”{}”]<\/p>\n

    Companies which contributed to the LUTI project:<\/b><\/h2>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.1″ _module_preset=”default” custom_css_main_element=”display:flex;” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/icp.jpg” title_text=”LUTI – INOVA – Info letter 1.2+.docx” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/goba.jpg” title_text=”goba” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/helios.jpg” title_text=”helios” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/optika-mesec.jpg” title_text=”optika-mesec” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2025\/09\/dobra.jpg” title_text=”dobra” _builder_version=”4.27.3″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.1″ _module_preset=”default” custom_css_main_element=”display:flex;” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/alcom.jpg” title_text=”alcom” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/analitica.jpg” title_text=”analitica” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/medium.jpg” title_text=”medium” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_image src=”https:\/\/www.inova-visionlab.eu\/wp-content\/uploads\/2023\/09\/sora.jpg” title_text=”sora” _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ admin_label=”Projects” _builder_version=”4.23.4″ _module_preset=”default” locked=”off” collapsed=”on” global_colors_info=”{}”][et_pb_row _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.23.4″ _module_preset=”b585debc-5839-4b51-bdf5-170e0d122058″ header_2_text_color=”#FFFFFF” text_orientation=”center” global_colors_info=”{}”]<\/p>\n

    Other projects<\/h2>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_blog fullwidth=”off” posts_number=”3″ include_categories=”4″ show_author=”off” show_date=”off” show_categories=”off” show_pagination=”off” _builder_version=”4.23.4″ _module_preset=”default” header_font=”Cormorant Garamond||||||||” header_font_size=”2.3em” read_more_font=”|||on|||||” read_more_text_color=”#E02B20″ read_more_font_size=”18px” read_more_line_height=”2.6em” border_width_all=”0px” global_colors_info=”{}”][\/et_pb_blog][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

    LUTI is the frist paper ever developped to convert reflected LED light into light with more physiological spectrum. <\/p>\n","protected":false},"author":1,"featured_media":230,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-92","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products"],"yoast_head":"\nLUTI* \u2013 the light converting paper - INOVA VISION LAB<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.inova-visionlab.eu\/en\/luti-the-gentle-light-converting-paper\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LUTI* \u2013 the light converting paper - 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