Imagine walking into a factory, noticing the ceiling, 25 feet overhead, lined with rows upon rows of similar-looking pipes. “How am I possibly supposed to know what goes through these pipes? How can I possibly check if they have been cleaned properly, and how can I possibly kasher them?"
When we purchase products for Pesach, we look for a hechsher that we respect, and we rely on that hechsher to make sure everything is done properly. Fortunately, an experienced mashgiach will know how to trace all those pipes and figure out what each one contains, although it will take him time to do so. Yet, most of us do not know what it is like to be in a factory that is supervising a Pesach-dik production run, nor do we know what it is like to be checking a factory to see if it is maintaining its kashrus program. We also don’t really know why one hechsher is acceptable and another is not. Most people apply the “What do the neighbors use?” system, or , more accurately, “What does the chevrah use?” or “Do bnei Torah eat from that hechsher?” approach. Although one article cannot answer most of these questions, it can provide some direction and background.
Let me begin with a typical kosher-for-Pesach story. Ketchup, a common North American household product that, in some households, is an irreplaceable staple, is a relatively simple product containing tomato paste, water, corn sweetener, vinegar, salt, spices and flavoring. Several of these ingredients require replacement for a Pesach-dik product. Corn sweetener is kitniyos, and would require replacing, probably with a kosher-lePesach sugar made from either cane or beets. Pure spices ground for industrial use should be fine, but spice extracts or oleoresins will require more research. The water should not present any problem, and the tomato paste and salt used for commercial production should also be fine, but it always pays for the hechsher to double check the manufacturer.
Both the vinegar and the flavoring could contain chometz, and almost certainly contain kitniyos if they did not come from a specially-made Pesach run. Let us see how these sensitive ingredients will be handled:
Regular vinegar, usually called white vinegar, is manufactured from alcohol processed with yeast, vinegar food, and perhaps other raw materials, until the alcohol turns to vinegar. Every one of these ingredients can involve a potential chometz issue: Alcohol is commonly produced from grain. Vinegar food may alsoinclude chometz ingredients. Kosher lePesach vinegar would require that the alcohol, the yeast and the vinegar food all be specially made from a non-chometz, non-kitniyos source. Assuming that the hechsher certifying the production of the ketchup is not the one that certified the vinegar, the rabbonim or poskim of the hechsher on the ketchup will decide which hechsher for Pesach-dik vinegar they will accept.
In theory, kosher lePesach vinegar could be produced in a much easier way with virtually no halachic complications. Chemically, white vinegar is a solution of acetic acid and water. Pure acetic acid can be produced synthetically, and, therefore, a product identical to vinegar can be produced by simply mixing glacial acetic acid and water, which would be a very easy item to produce, simple to supervise ,and less expensive than kosher-lePesach vinegar.
So why not?
If it is much easier to produce kosher-lePesach vinegar this way, why is it not done? The answer is that it is illegal in the United States to call this product “vinegar,” notwithstanding that it is perfectly safe to use and will accomplish whatever the “vinegar” in your product will. In the United States, this ingredient must be labeled as “diluted glacial acetic acid” or something similar, and companies are concerned that customers will not purchase a product with this ingredient listed on the label.
Vinegar in the United States must be produced by the fermentation of alcohol, and the alcohol used for this production must also be fermented and distilled from sugars or starches. Nevertheless, there are many countries of the world where it is perfectly legal to use synthetically produced vinegar in food production and to label it as “vinegar.”
Ketchup requires the addition of herbs, spices or flavoring. The size of flavor-producing companies varies in as great a range as you can imagine. I have seen flavor companies that are quite literally mom-and-pop shops, and I have also been inside flavor factories the size of a small city. Some flavor companies manage without any major sophisticated equipment, whereas others own hundreds of production machines that each cost in the millions of dollars.
Here is a very practical example: Many products are dried today in a massive piece of equipment called a spray dryer or spray tower. The purpose of this piece of equipment, usually about the height of a three-story building, is to convert a liquid product into a powder. It does so by pumping the liquid until it is dropped through the top of the spray tower. In the tower, which is usually gas-fired, very hot air, usually about 500 degrees Fahrenheit, is forced along the inside walls of the tower, and the liquid product is dropped through the middle. The temperature is hot enough so that all the liquid evaporates, leaving behind a powder that drops to the bottom of the spray tower, where it is boxed or bagged.
Many thousands of spray towers are used in the United States alone. Possibly the most frequent use is to powder skim milk, which is highly perishable, into nonfat dry milk, which occupies a fraction of the space of the liquid product, and, if kept dry, has an indefinite shelf life without any refrigeration, thus making it very easy to store and ship.
Assuming that this spray tower is used only for milk, the major question that will occur is how to kasher it for a cholov Yisroel production. There are many halachic issues here, including that a spray tower physically cannot be filled with water and brought to a boil, which constitutes hag’alah, the most common way of kashering. Furthermore, it is unlikely that this method suffices to kasher the tower, since the absorption into the walls of the spray tower is without liquid.
Another option is to kasher the tower by use of a flame thrower, basically a larger form of a blow torch.
On the other hand, there are halachic authorities who contend that the spray dryer does not even require kashering, since the product is not supposed to touch its walls. Because of the tremendous heat that absorbs into the stainless steel walls of the dryer, product that touches them burns, and will probably pass distaste, nosein taam lifgam, into the final product. Some of these last-quoted authorities contend that a spray tower does not require kashering.
There are also companies that have contract spray-dry equipment. This means that the spray tower is not constantly in use for their product,and, not wanting to leave a very expensive piece of equipment idle, they will spray dry other products during the “down” time, when they are not producing their own products. For example, I have seen wine powder, powdered meat extract, medicinal items, and even blood, spray dried on equipment that was also at times used for kosher supervised products.
At this point, let us return to our special kosher-for-Pesach ketchup production. A flavor whose components were spray dried, which is a fairly common procedure, would require researching what else was produced on this spray dryer, or attempting to kasher the spray dryer. All of these complicate the research involved in producing our kosher-lePesach ketchup.
To resolve all these potential complications, the flavors used for the production of this kosher-lePesach ketchup were ordered from a small manufacturer. The order was to use only pure essential oils that would be extracted by pressure -- in other words, oil that is squeezed out of the spice source in what is called a “cold press” operation and without any extracting aids. Many essential oils are extracted using alcohols such as ethanol or glycerin, which could compromise the kashrus of the product.
Of course, a knowledgeable field representative was dispatched to oversee that the flavor company indeed followed the instructions and used only cold press essential oils. The flavor company blended together these liquid oils and then added a significant amount of salt to the product. The reason for the addition of the salt was to dry out the finished spice so that it could be easily shipped and stored. From a kashrus perspective, this was certainly a far better alternative to using a spray-dried product and kashering the spray dryer.
Now our hechsher has successfully located all the ingredients and overseen the production of all the raw materials for the kosher-lePesach ketchup. The next step is to send a knowledgeable mashgiach to the production facility where the ketchup is to be manufactured, to ascertain how that equipment will be kashered prior to the Pesach run, and to clarify with the company its production schedule prior to the dates when the equipment will be kashered and the Pesach product manufactured. He also needs to check whether other products are being made in the facility, or a nearby facility, that uses the same heating system to produce chometz products.
And this is for a relatively simple product.
Having shown how a relatively simple Pesach-dik product is made, I will shift from the simple to what is possibly the most complicated: the kashering of hotels for Pesach, which has become a colossal international business. A glance at any frum newspaper includes advertisements marketing opportunities to spend Pesach on any continent, always only with non-gebrochtz, shemurah matzos, cholov Yisroel, and glatt kosher, under a rav’s strict supervision, with several prominent English speakers as scholars-in-residence, babysitting provided during the lectures, and many sightseeing activities available for Chol Hamo’eid. Yet, individuals interested in experiencing Yom Tov this way should be aware that kashering a hotel for Pesach is a mammoth and difficult process. It is even more difficult to do when the entire hotel is not being kashered for Pesach, when the hotel’s regular kitchen staff are used, or when the chef and sous-chefs are not halachically observant themselves.
By the way, travel tours create the most difficult issues regarding kashrus supervision. Many hechsherim will simply not supervise them because of the complications involved with traveling to different places and using products that are available locally. These issues become even more complicated when it comes to Pesach supervision.
Aside from the many nightmares I have heard regarding Pesach hotel hechsherim, I will share with you just one nightmare story of which I have firsthand knowledge. At one point in my career, I was in charge of the hechsherim in an area that encompassed a well-known tourist area. Simply put, if anything was supervised kosher in our area, I knew about it. There indeed were several reliably kosher tours, some of whom used our kashrus organization to supervise their activities and some who did not, but, it seemed to me, still maintained a fairly respectable kashrus standard.
Once, I saw an advertisement in the Anglo-Jewish press for a “glatt kosher tour” through our area. Since none of the tour companies with which I was familiar was involved, I called the number listed for reservations and inquired who was overseeing their kashrus in the area. The woman who answered the phone dutifully notified me that “Jim Klein overseas all food production and kashrus arrangements in that area.” I knew Jim well. Not only was he completely non-observant – he was married to a non-Jewish woman! Yet, the tour was advertized as glatt kosher, chassidisha shechitah. I have no idea if it was chassidisha shechitah, but it was certainly not glatt kosher, and halachically was not kosher at all!
For sure, we know not to use anything "supervised" by Jim. Can we eat something supervised by Yossel? The answer is that we rely on a hechsher that uses yir’ei shamayim personnel who are knowledgeable both in halacha and in the technical aspects of modern kashrus. Particularly, when we decide which Pesach products we allow into our home to enhance our simchas Yom Tov, we use only hechsherim that impress us with their expertise and their concern about the important role they play in our lives.
This Shiur is published also at Rabbi Kaganof's site