Showing posts with label water. Show all posts
Showing posts with label water. Show all posts

Wednesday, July 21, 2010

Genetically Modified



Over the past few years, there has been a growing popularity in organic food. This has stemmed from the increased knowledge the public has on how our food is made and where it comes from.  One of the primary reasons for the push to organic options is the food industry's production of genetically engineered foods.

Genetic engineering takes the genetics of one organism and puts it into something else. With genetically engineered food, animals and plants are transformed primarily so we can produce more food faster and cheaper. Genetically engineering food has become so prevalent that the majority of processed foods in a grocery store contain genetically engineered ingredients (http://centerforfoodsafety.org/geneticall7.cfm).

There are many who argue that genetic engineering has adverse effects on humans, animals, wildlife and the environment. A recent documentary, Food Inc. (http://www.foodincmovie.com/), focuses on some of these concerns. While there are many concerns, in a world where people starve, is the ability to bring more food to market at a cheaper price a bad thing? It is a moral paradox and I suggest you do a little personal research to come to your own conclusions.

A similar genetic engineering concern has also been recently publicized in the commercial paper industry (Forests Of ArborGen Genetically Modified Trees OK'd For U.S. South).  For years, paper companies have been planting forests of trees to be used for commercial paper. These forests help protect the conservation of natural forests.

Eucalyptus trees are being planted as they grow faster and produce high-quality pulp but they only do well in warm year-round climates such as Florida.  Genetic engineering has allowing the company ArborGen to change the genetic makeup of these trees by modifying them to withstand freezing temperatures which will enable their growth in states north of Florida.  The concern is that these genetically engineered trees will invade the natural ecosystem. That could cause a number of problems. ArborGen is confident they can control the trees but questions still remain.

Again, as with genetically modified food, this creates a moral paradox. We know trees are good as they take in carbon dioxide and produce oxygen. Is it bad that paper companies are looking for more ways to increase the number of trees put in the ground? From the paper company's perspective, the alternative is to use trees from natural forests but no one wants that. In the effort to produce more trees and paper though, one has to be concerned about genes being transfered from a genetically engineered tree to a natural tree especially when it is believed by some that the eucalyptus tree uses more groundwater (lowering the human supply) and could be more flammable.

There are strong arguments for and against genetic engineering which creates the dilemma. Perhaps in a few years we'll have conclusive knowledge to know whether genetically engineering our food and our trees was a good or bad idea.  

Thursday, May 27, 2010

Coatings



Adding seasoning or a marinade to meat, fish or a vegetable is a great way to tenderize it and add a little flavor. These coatings, add a characteristic to your food that you just can't achieve by cooking without them. Even a chef will add at the least a little salt and pepper to a filet! It's fair to say that coatings add complexity and enhance the overall taste, smell and visual presentation of a meal.

As a printer, we also look to achieve enhancements on print materials by adding varnishes and other coatings. Press coatings and varnishes improve the look of a printed piece by creating different textures and visual effects. They can change the look and feel of a brochure drastically and as with cooking, there are a number of coating possibilities to choose from depending on the artist's desired outcome.

There are a number of things to consider when choosing the right coating for your print project. While I recommend you work closely with your printer to see physical samples for the different types of coatings, I have listed a few things that will help you get a rough idea for the coating of your choice (there are many more types of coatings but these are the most common):

Aqueous Coating - water based coating that adds protection to a press sheet, helps dry the press sheet quickly and can add a variety of different finishes such as gloss, dull, matte, satin, pearlescent, and touch coatings.

Gloss Finish - varnish or aqueous coating that adds a high reflective, shiny appearance to the sheet.

Dull or Matte Finish - varnish or aqueous coating that reduces the sheen on a press sheet.

Satin Finish - varnish or aqueous coating that creates a smoother sheet and less shiny than a gloss finish but more shiny than a dull or matte finish.

Varnish - a liquid based coating that can be either gloss, satin or dull. Varnishes can also be tinted with a pigment for effects.

Pearlescent Finish - made from crushed mother-of-pearl particles, this coating adds a pearl like smooth finish.

Soft-touch Coating - an aqueous coating that adds different textures than a traditional finish (rubbery finish or leather-like feel).

UV (Ultraviolet) Coating - Clear liquid coating that dries with ultraviolet light leaving a high-gloss, satin or dull finish. A gloss UV Coat will give you the most shine but will also result in the most visible finger prints.

Textured and Sandpaper Finish - Coating that creates a rough texture and depth to an image area or creates a sandpaper type feel.

Scented Finish - Scents are within the coating and when applied and rubbed on the press sheet, a fragrance is released.

Flood Coating - process of applying any type of coating above to the entire press sheet or entire image area as one flat coating.

Spot Coating - process of applying any type of coating above to an isolated or designated area (ex - part of an image that you want to stand out) on a press sheet.


Now that you have an idea of some of the different types of coatings available in printing, I will share with you one of my favorite types of coatings (marinade) that I use on pork and chicken meals. Here is the recipe and check out the video above for detailed instructions on making this wonderful meal:

Garlic Dijon Basil Pork
- Mix together well olive oil, dijon, chopped garlic and basil together. Your the chef so you choose your recipe size! I add about 1-2 tablespoons of both oil and dijon, 3 cloves of garlic and about 1/2 teaspoon of dry basil (or 1 teaspoon of fresh basil).
- Line a baking dish with tin foil and place the pork in the dish.
- Salt and pepper pork and baste the mixture thoroughly on both sides.
- Let the pork sit at least 15-20 minutes to absorb the marinade (the longer it sits the better it tastes) and go ahead and pre-heat the oven to 450 while you wait.
- Cook about 12-15 minutes or until done to your desired level. I like to eat pork right around 150 but this is medium and may not be to your tastes.

Friday, February 12, 2010

Why Do Print Projects Take So Long To Produce? Part 1: Washing



We have all heard about the dangers of cross contamination and why it is important to wash your hands so frequently when cooking. That isn't the only thing we have to wash though - think about all those fruits and vegetables we cook and eat? With fruits and vegetables, we rinse them with water so we can get any pesticides and herbicides off our food. With meat and poultry, we frequently wash our hands and keep everything away from our raw food to guard against E. coli and salmonella. Also, we wash utensils and plates while we cook to avoid a sink full of dishes that no one wants to tackle after a meal. By the end of your day in the kitchen, if you stop and think about it, you have spent half your time just washing things whether it is food, your hands or the dishes. No wonder so many people skip out on a home cooked meal.

Believe it or not we have to go through the same time consuming process of washing multiple things in a print process that you go through when you're simply cooking a meal in your kitchen. We have to wash our hands to remove potentially dangerous chemicals and to prevent grease and dirt from marking on a plate or a press sheet. We clean the tanks in the image processor to keep sediment from damaging the plates. We clean out toner in a digital press or ink-jet head to ensure a clear image. We wash the blankets on a press to guarantee a high-quality image transfer. In addition to the blankets on a press, we wash the rollers to prevent ink build-up and roller deterioration.

Today, even with technologies such as automatic wash-up devices that take away the need to clean a press by hand, the process can be time consuming and it must be done often enough to produce consistent, high-quality printing. Just like buying paper, washing is always going to be an element of the print process that you just can't get around. So the next time you say to yourself why do print projects take so long to produce, remember washing.

Thursday, September 17, 2009

Oil & Water



Have you ever noticed how certain recipes always ask you to pat your poultry or fish down dry after rinsing it with water? We do this exercise but why? The reason for this is because oil and water just don't mix. If you wash a piece of chicken by running it through water and do not dry the chicken before adding oil, the water will repel the oil. If you pat the chicken dry it will be more receptive to absorbing the oil and you will achieve a nice coating.

This same concept, that oil and water do not mix, is the main principle behind offset printing. The poultry in printing would be your plate. Not to be confused with something you put your food on, a plate is a metal sheet that attaches to a cylinder on press.

The plate contains the actual dotted image that will be printed for each color we use (CMYK). The plate’s image area contains chemicals that are highly receptive to oil based inks but naturally repel water. When we attach the plate to the cylinder on the offset press, the plate will rotate and come into contact with dampening rollers (water) and then ink rollers (oil). The water dampens the plate and when this happens the oil receptive image area will repel the water, while the non-image area will receive the water. When the plate comes into contact with the oil based ink, the ink will only adhere to the oil receptive image area and it can not adhere to the non-image area because that part of the plate is coated with water. Because plates do not transfer the cleanest image to a sheet of paper, the inked image is then transferred (or "offset") from the plate to a durable rubber blanket that conforms to the surfaces of all types of paper stocks. The blanket prints the image to the paper completing the process of offset printing.