ITBA20080032A1 - AN INNOVATIVE SURFACE REMOVAL PROCESS, THROUGH LASERS AND A SPECIAL COATING, OF GRAFFITI AND WRITTEN, FROM THE INFORMATION LEGALS, POSED IN THE PRESSES OF MONUMENTS - Google Patents

Description

DESCRIPTION

Dell? Industrial Invention entitled:

An Innovative Process of Surface Removal, by Laser and a special coating, of GRAFFITI and WRITINGS, from the informative LEGENDS, placed near Monuments.

FRONT DESCRIPTION OF THE ART

Summary - Introduction

Information Legends are often placed near Monuments, Historic Palaces, Churches, Cathedrals, etc. These report important historical information and comments regarding the Monument in question. How much reported? often written in different languages, chosen according to the typical typology of the tourist who visits these monuments. Until a few years ago, these Legends were built on a plastic base so, following the IR, UV, VIS (InfraRosse - UltraViolette and Visible) radiations, coming from the Sun, together with the effects produced by rain and other atmospheric contaminants, the same Legends had a very low average life cycle and, the colors? of the Writings, Drawings and Photos easily faded and / or discolored. Nowadays these problems have been positively solved, with the design and subsequent construction of a new panel. This new product, patented with the ri. 00070298. ? it was then sold for use and application in Italy. This latest company? manages the National Cultural Heritage Communication Plan for the whole Italian territory.

MAIN TECHNICAL FEATURES OF THE NEW PANEL

1. The Panel? made on a 1.2 mm steel plate;

2. the printing process? made through a screen printing process;

3. the vitrification process? obtained by heating in an oven at 800? C;

4. screen printing? handcrafted and subjected to Quality Control? to ensure a high level of Aesthetic Characteristics;

5. the vitrification process? obtained through an industrial process, of the controlled type, so? to be insured:

4 the Inalterability? to UV rays;

4 the Inalterability? at room temperature;

4 the Resistance to Fire (to Fire);

4 the resistance to abrasion;

4 the Resistance to Scratches;

4 the impermeability? ai color? neutrals and pigments of both chemical and natural origin, as well as fats and oils;

4 Maintenance for the Cleaning of the legend, with the use of natural or chemical soaps or with the use of denatured ethyl alcohol or solvents of chemical synthesis.

Thanks to these characteristics, the surface of the panel and the imprinted print, both written and graphed, do not undergo any chromatic alteration. Q background color can? be opaque and chosen in a range of neutral colors. The range of colors, for the subjects and the printing of the texts, is not limited. In the light of the above characteristics, this new type of panels, after 9 years of outdoor exposure, does not show any particular signs and visible problems.

GOAL THAT INNOVATION INTENDS TO ACHIEVE

ANALYSIS OF THE RESULT ACHIEVED

AN INNOVATIVE PROCESS OF SURFACE REMOVAL BY LASER

All of the above? was considered necessary and indispensable in order to think and study a possible and correct solution for the cleaning of this type of Legende, when? , having been soiled, they require careful maintenance. The problem exists when some vandal and unconscious person produce various writings, graffiti and drawings on the surface of the panels. Some inks are actually easily removable through the use of soapy water with natural soaps, not very aggressive. Other types of inks and paints and varnishes need to be treated differently, that is, for example, with a cotton ball soaked in denatured alcohol (ethanol) and, at other times, with a chemical solvent, for example, Acetone . On the other hand, in many other cases, none of the aforementioned methods of surface cleaning have solved the problem. indelible, fluorescent, permanent, water insoluble inks were to be removed; moreover, the same, as a result of their assured and praised characteristics of gripping and stability, had been able to penetrate into the glass substrate of the panel, anchoring themselves strongly to it. This difficult problem, difficult to solve, after having been studied under the aegis of various theoretical-experimental approaches, has seen a possible solution mature with the application and fusion of different types of portable lasers, which can be set up on site. In light of this, the Laser pi? appropriate? looked like a Nd - YAG, as it emits an IR Radiation, a? 1,064 nm (nanometers), which is not? absorbed by the glass surface (substrate) of the panel, resulting almost totally transparent at said wavelength. In this way the optical radiation of the laser can? ablate (remove by vaporization) these difficult and particular Inks - Varnishes and Paints, penetrated and anchored to the same glass surface within its thickness, for a depth of of a few tens of pm (microns). After some preliminary tests, following a mapping of the Degradation,? An Innovative Process of Surface Removal of GRAFFITI and WRITINGS from the informative LEGENDS was developed and used, through a Nd-YAG Laser and a special coating. This new method and process, under the supervision of? Superintendence for Architectural Heritage and Landscape of Puglia ?, was approved for use on these Legends. This Technique employs both the Daurelio Technique n.l and the Daurelio Technique n.3 (*). according to the needs? and the type of graffiti-writing-drawing to be removed. Said two techniques (developed and used by the same Author of this Patent) employ a laser beam of a pulsed Nd-YAG at ns (nanosecond), which use, instead of a Convergent Focusing Lens, of the plane-convex type , a Cylindrical Lens (Plane-Convex or Concave-Convex) which transforms the geometry of the Beam entering on it from CIRCULAR to RECTANGULAR (Knife Blade - in Focus or in different Rectangular Areas, depending on the different degrees of De-Focusing of the Laser Beam) coming out of it (Daurelio Technique n.l). If, to all of the above, we add the use of the Daurelio Technique n.3 (*). which consists in the application of a very thin layer (thickness from 20 to 30 microns or a little more?) of Colloidal Graphite (sprayed with a common Spray Can) or common Graphite of a pencil or lead, with the initials B, 2B, 3B, 4B or higher (that is, of very low Hardness, therefore very soft), of a gray-black-brilliant color, which covers the Graffito, the Writing, the Drawing, which did not come away with the use of all the other techniques, now finally they can be completely removed from the glass surface of the LEGEND-Panel, without damaging the surface of the same. An example of the use of this new Technique, applied to the Legends sector,? reported in the DRAWINGS Attachment, in the TAW. from I / VII to VII / VII. The results obtained on 2 Legends are shown, exhibited in the archaeological site of DOLMEN di BISCEGLIE (BAT). A Legend? a Glass substrate (MIRABILIA), the other? a Plastic Substrate (with inscriptions. in the province VISITED. PROVINCE of BARI). The results obtained can always be viewed in the TAW Drawings Attachment. from I / VII to VII / VII, are excellent on the MIRABILIA Legends and a bit? less excellent, even if acceptable, on the other type of plastic-based Legend.

Technical data

Portable Nd-YAG laser, produced by QUANTA SYSTEM of Milan (Italy), Model PALLADIO, equipped with an articulated arm (surgical type), with seven joints, with seven mirrors for the laser beam (which travels inside a tube black anodized aluminum), in Q-Switch Mode operation, Pulse repetition frequency 1- up to 10 - up to 20Hz and single pulse, Pulse width (duration) 8ns (nanoseconds),? 1.064 nm (nanometers), Variable energy up to a maximum of 500 mJ per pulse. Cylindrical lens, concave-convex, with a focal length of 0.4 or 0.5 m, in BK / (borosilicate), without any anti-reflection coating for? 1.064 nm. The colloidal GRAPHITE coating? been obtained with the use of Spray cans type DAG 154 RFU or 170 or 197, produced by Acheson Colloids Company - 1600 Washington Avenue - Port Huron. MI 48060- U.S.A.

In the absence of the spray can or, alternatively of it, you can? use the very common Graphite, contained in the leads or pencils, with the initials B, 2B, 3B, 4B or higher (that is, of very low hardness, therefore very soft), of a gray-black-brilliant color. Do not ? necessary to reduce it to dust, just rub it on that graffiti, resistant even to the action of the Laser and Daurelio Technique n. 1, until it is completely covered. Can you? go over more? times before using the laser beam and, if there are still some Graffito residues, you can? again re-apply another layer of Colloidal Graphite or Pencil and the Ablation operation is repeated, without any problems and / or possible damage. Can you? repeat this operation n times, as much as desired and necessary.

Note from the INVENTOR

The foreseen and specific and special PROTECTION GLASSES for the face must be absolutely used and worn. eyes and other parts of the body. which could be randomly irradiated with an IR laser beam. in O-Switch Mode. Pulse repetition frequency 1 - up to 10 - up to 20Hz and single pulse. Pulse width (duration) 8ns (nanoseconds). ? 1,064 nm (nano meters). Variable energy up to a maximum of 500 mJ per pulse. Said technique v? used only and only by Expert Personnel and suitably trained to use both the Technique and the Laser Source, as well as? of possible risks and accidents e. finally . how to behave in the event of an accident.

Claims (1)

CLAIMS Do you claim all the rights inherent in the use and use, as well as? the disclosure for didactic purposes (unless it is mentioned? Principal Inventor and the other 2 associated Inventors), for any reason, in the industrial, artisanal field, in public and private restoration laboratories (monumental, historical and archaeological), of the Technique of Cleaning, as per Patent, for ALL types of information LEGENDS, external or internal, placed near: 1. Monuments (of any type) 2. Historic buildings 3. Churches and Cathedrals 4. Archaeological sites 5. Museums (public and private), falling under the protection of Superintendencies of any kind. The above applies to: 6. Legends to Glass substrate 7. Legends to Plastic substrate (of any type), thermo-resistant 8. Legends to Metal substrate, ferrous-based (of any type), thermo-resistant 9. Legends to Metallic substrate, non-ferrous based (with any type of Chemical Element - Metal and all the Alloys made with each metal), thermo-resistant.