This article presents some of the underlying ideas and terminology connected with electro-etching. "The basis of electro-etching: a simplified explanation" by Alfonso Crujera & Bob Perkin, 2015. Mop up any ferric chloride (or copper sulfate) spills with sodium carbonate and water. When finished etching the plate, thoroughly rinse front and back under cool running water.Do not let solution drip on the counter or on yourself. When removing the plate from the etching bath, remove lift the plate directly above the bath, lower one corner, and let the ferric chloride drip back into the bath.Periodically check on the plate while etching. Lower the plate into the etching bath until the top edge is fully immersed. Burnish the tape well to assure good adhesion to the plate. The masking tape functions as a handle for lowering the plate into the bath. Firmly adhere several pieces of masking tape to the back of the plate prior to immersing your plate in the ferric chloride tank.If the plate is not going to be heated, as when melting rosin or applying softground, contact paper is a simple solution. The back of the plate must be covered with acid resist prior to etching.This test plate will provide a great deal of information quite quickly and will help in making decisions about how the ferric chloride bath effects the weight of the etched line prior to getting involved with a large plate. Begin with 1 minute, then 2 minutes, then 4 minutes, 8 minutes, 16 minutes, 32 minutes, and so on. It is recommended to test a plate with double the exposure time with each period in the bath. It is advisable to etch a small test plate to determine the strength of the bath and the effect time has on the exposed plate. The best way to determine the effect of an etchant on the plate is by experimentation and observation. The strength or baume of the ferric chloride, and the amount of use the solution has an impact with the speed of the etch. Higher temperature speeds up the action of the etchant. Several considerations come in to play when determining the length of time, one should expose the plate to the etchant. (It is the addition of the copper in the ferric chloride bath that is cause for hazardous disposal) Once the solution turns a dark green-ish black, the bath is usually slow, and may need to be disposed neutralized and disposed of safely. As copper plates are etched, the solution is a muddy brown, and remains quite effective. When new, ferric chloride is a clear red/brown color. There are a few visual cues that assist in determining the efficiency of a ferric bath. The most reliable source for 48 baume (Be) ferric chloride, commonly used for photogravure, is FUJIFILM Hut Chemicals Specialty Products Group. A hygrometer is used to measure the baume of the ferric chloride. If ordering an already dilute, 42 baume (Be) solution, there is no need to adjust the solution with the addition of water.Ī ferric chloride etching bath is most effective after a bit of etching has taken place.
#Intaglio examples free#
Ferric chloride is free from harmful gas emissions it will stain but will not burn skinįerric chloride is available from most chemical suppliers in the less saturated 42 baume. Also, while multiple column keys can be used, they are not well tested, so if you use them, let us know what issues you run into.Ferric chloride has virtually replaced the use of nitric acid and Dutch mordant as a solution for etching copper. Although etching is commonly considered a process of using acid to bite the metal, ferric chloride is actually a corrosive salt. Ferric chloride has the advantage of greatly improving the safety of etching. The ORM will expect some sort of primary key to bind to.
So if your repository provides a model named user_profiles, it will be normalized to userProfile. All model names and property names will be normalized to camelCase.
#Intaglio examples code#
The ORM will not care what names you use on the repository side, but it will normalize them to make it easier to code around. We made some design decisions to make the implentation simpler and easier to maintain. The ORM should be pretty easy to use, but there are some things to keep in mind.
#Intaglio examples driver#
The REST repository comes with a Request based driver as well as a jQuery based one to be used on the front end. The MySQL repository will use database introspection to define your model schema so all you need to provide are the connection details to get started using with Node. mysql ( ) RepositoriesĬurrently, Intaglio ships with a MySQL and a REST respository (designed to be used with the Intaglio based REST server) to get you up and running quickly.
Var Intaglio = require ( 'intaglio' ) /** * Instantiate the MySQL repository that the ORM will bind to.