Breathe Nothing But Air

A visual comparison of healthy versus harmful gases.
A visual comparison of healthy versus harmful gases.

My father is a potter, and his job includes all sorts of dangers to the lungs, such as dust from dry clay, mist from spraying glazes, and fumes from firing pots. His words of wisdom for dealing with all this safely are “breathe nothing but air.” Putting these simple words into practice can be a bit more complicated, however.

Proper ventilation is a must when working in almost every aspect of prop-making: wood-working, welding, molding and casting, painting, etc. You can (and should) supplement it with more specific safety measures, such as respirators and dust collection systems, when necessary, but overall ventilation is still the backbone of any healthy prop shop. Without ventilation, you will be putting other workers and visitors to your shop at risk. Also, many harmful particles remain in the air for a long period of time, well after you’ve completed your task and removed your respirator.

It’s helpful to know the different kinds of harmful substances that may enter your lungs, as this will determine what kind of protection you need. I learned about the various physical forms a chemical can take while working at the Santa Fe Opera, which has a great safety training program:

Solid, liquid, fume, dust, mist, gas, vapor.

I would hope you know what a solid and a liquid are; the other forms may require some explanation. It is important to know the difference between them because they determine what kind of protection you need to keep them out of your lungs. Wearing a dust mask to protect against vapors, such as those found in spray paint, is not only useless, but can even be more harmful than wearing nothing. Why? When wearing any kind of mask or respirator, your lungs need to work harder to pull in enough air to breathe, so wearing the wrong kind of mask will make your lungs suck in more spray paint than when your breathing rate is lower.

When a solid is heated to its melting point, it may release a fume, which is a solid particle suspended in the air. Welding and soldering are common practices which create fumes.

Sanding, grinding and even just handling powders can create dust. Like fumes, these are solid particles floating in the air. Though most dust is trapped by your nose hairs, some dust is so fine it can make it all the way to your lungs; these are known as “respirable” dusts, and are the most harmful. Some are so fine they are invisible.

Tiny liquid droplets in the air are known as a mist. You can create mists from spraying liquid, or from boiling it. Some mists may even carry solid particles inside.

A gas is the third phase of matter, after solid and liquid. Normally, when we talk about what form a certain material comes in, we talk about what phase it is at room temperature. Common gases used in the props shop can include argon and carbon dioxide for welding, and acetylene and propane for torches.

When a liquid evaporates, it becomes a vapor (notice how “vapor” appears in the word “evaporate”). Evaporation can be sped up by heat. Vapors are molecules just like gases, and the only real difference between the two are that vapors can re-condense to a liquid or solid in a high enough concentration.

You’ll notice the first three forms–fume, dust and mist–are all particles of some sort. You can filter particles with a physical barrier, such as those found in NIOSH-approved disposable respirators (sometimes referred to as “dust masks”).

Gases and vapors are molecules and cannot be physically filtered. A barrier which keeps molecules of harmful gas from passing through will also keep molecules of oxygen from passing through, and you kind of need oxygen to live. In these cases, you need a respirator with a chemical cartridge. A chemical cartridge will either capture and hold the harmful molecules or chemically react to transform them into something less harmful. One of the earliest substances to be used in this manner is activated charcoal, which is still relied upon for filtering many kinds of chemicals. Your Brita filter uses activated charcoal to filter your tap water.

There is no single type of chemical respirator cartridge which will filter out every kind of gas or vapor found in prop making. It is absolutely vital that you know and understand what kinds of chemicals you are working with and what physical forms they are in so you can choose the correct type of respirator and cartridge to wear. As with particles, wearing a respirator makes your lungs take bigger and deeper breaths to compensate for the reduced flow of oxygen; wearing the wrong kind of respirator means you are taking bigger and deeper breaths of a toxic substance than you would wearing nothing. Some chemicals cannot be filtered by any type of cartridge and require either a supplied-air or self-contained breathing apparatus.

In any case, proper ventilation in your shop is still your best defense against airborne chemicals.

A Union Propmaker’s Tool Kit

IATSE Local 44 has a great list of the various department which fall under “props”. Their descriptions of the different crafts also include the expected set of tools one should show up to work with. Their website used to list the tools required for a propmaker, which I have listed below:

  • 16 oz. Claw Hammer
  • 25′ or 30′ Measuring Tape
  • 100′ Measuring Tape
  • 12″ Combination Square
  • Framing Square
  • Bevel Square
  • 8 pt. Hand Saw
  • 12 pt. Hand Saw
  • Back Saw
  • Key Hole Saw
  • 1/4″ – 1/2″ – 3/4″ – 1″ Wood Chisels
  • Cold Chisel
  • Box Plane
  • Hand Axe
  • Two Chalk Boxes
  • Dry Line
  • Line Level
  • 24″ or 30″ Level
  • Compass
  • Angle Dividers
  • 24″ or 30″ Wrecking Bar
  • 10″ Vise Grip Pliers
  • Pliers
  • Diagonal Cutters
  • Straight-head and Phillips-head Screwdrivers
  • 10″ Crescent Wrench
  • Nail Sets – Various Sizes
  • Wood Files – Various Types and Sizes
  • Sharpening Stone
  • Tool Belt
  • Assorted Pencils and Marking Crayons
  • Plumb Bob
  • Utility Knife and Blades
  • Gloves
  • Cordless Drill
  • Large Ratcheting Screwdriver (Yankee)
  • Tool Box

IATSE Local 44 is also known as the Affiliated Property Craftspersons Local 44; it covers workers in film, TV and independent shops in Los Angeles (though members work throughout the world). As such, the above list is specific to those employees. Still, it is a good starting point for propmakers in other situations, locations and fields. My own traveling prop kit includes some tools I can’t live without, and does not include some of the tools listed above. What does yours look like?

As a postscript, you will notice the list contains no tools for soft goods, sewing or upholstering. This is not an oversight; rather, these crafts are separate departments in the local, and thus have their own list of expected tools detailed on the website, which I may write about in the future.

The First Prop Master in America

In his book, Thirty Years Ago: Or, The Memoirs of a Water Drinker, William Dunlap describes what may very well be one of America’s first prop masters (or property-men, as they were called then). Written in 1836, it is an intimate look at the earliest theatres in New York City. First, he describes the housing of the backstage workers, which stood behind the theatre:

Opposite to the back or private entrance to this building, stood a lofty wooden pile, erected for, and occupied by, the painters, machinists, and carpenters of the establishment; to the north of which (where now the above-mentioned temperance hotel is planted), were several low, wooden dram-shops, and other receptacles of intemperance and infamy; and to the south, several taller wooden houses, occupied by the poor and industrious; one of which tenements, immediately adjoining the scene-house, was the residence of John Kent, the property-man of the theatre, and his wife. We have seen in the last chapter, that among other properties, he was to furnish a tarrapin-supper for the young manager and his joyous companions. As some of my readers may not be sufficiently initiated in the mysteries of stage-management, I will tell them what a property-man is.

Good to his word, Dunlap describes a property man’s responsibilities circa 1811.

Though, in such matters, I do consider my authority as indifferent good, yet I will first give higher. Peter Quince says, “I will draw a bill of properties, such as our play wants;” and Bottom, who appears to be the manager, gives us a list of beards, as “your straw-coloured beard, your orange-tawny beard, your purple-in-grain beard, or your French crown-coloured beard, your perfect yellow.”

That I may not mislead, let me note, that actors in the year 1811 found their own wigs and beards; but then property beards and wigs were supplied to the supernumeraries, the “reverend, grave and potent seignors” of Venice, the senatorial fathers of Rome, or parliamentary lords of England.

Quince performed the part of the prompter, whose duty it was, to give a bill of properties to the property-man; and these consisted of every imaginable thing. In the Midsummer Night’s Dream, for example, one property is an ass’s head; which, if not belonging to the manager, or one of the company, the property-man must find elsewhere. Arms and ammunition, loaded pistols for sham mischief, and decanters of liquor for real:—(for though the actors could dispense with the bullets, they required the alcohol,)—love letters and challenges—beds, bed-linen, and babies—in short, the property-man was bound to produce whatever was required by the incidents of the play, as set down in the “bill of properties” furnished by the prompter. Such was the office of John Kent, besides furnishing suppers occasionally for the manager, and doing other extra services, for which he was well remunerated, and experienced the favour of his employer.

He then describes the background of the property man, John Kent, and his wife:

Kent and his wife were old. In youth they had been slaves to the same master, under that system established and enforced on her colonies by that nation who at the same time boasted, justly, “that the chains of the slave fell from him on his touching her shores;” that he became a man as soon as he breathed the air of her glorious island; yet, with that inconsistency so often seen in nations as well as individuals, sent her floating dungeons with the heaviest chains, forged for the purpose, to manacle the African, and convey him to a hopeless slavery among her children in America; even refusing those children the privilege of rejecting the unhallowed and poisonous gift. But England has washed this stain from her hands; while the blot remains where she fixed it, and has produced a cancerous sore on the fairest political body that ever before existed.

Mr. and Mrs. Kent were not Africans by birth, but descendants from the people so long the prey of European and American avarice; and by some intermixture of the blood of their ancestors with that of their masters, their colour was that which is known among us as mulatto, or mulatre; still they were classed with what people of African descent (who abhor the word “negro”) call “people of colour.”

A few pages later, Dunlap provides a physical description of Kent himself:

Between the table and the door sat a man of sturdy frame, but time-worn; his age appeared to be sixty. He was darker than the woman, and his features more African. His crisped iron-grey hair thickly covered his head and shaded his temples. His forehead was prominent; with many deep wrinkles crossing it; while farrows as deep marked his cheek. His dress was that of a labourer. It was neat, but here and there patched with cloth that denoted the colour originally belonging to the whole garment. He held his spectacles in his left hand and his snuff box in his right. His eyes, full of respectful attention, were fixed on the figure nearest to the table and lamp; as were also, but with a more earnest gaze, those of the reclining invalid.

Dunlap then reveals how Kent became a property man through a dialogue with Emma Portland, the “heroine” of his memoirs:

“How came you to be brought so intimately in contact with theatres, and theatrical people, Mr. Kent?”

“I’ll tell you, miss. My master wished to give me a trade, and as I always had a notion of drawing, he put me apprentice to a house and sign-painter that lived in John-street, near the play-house: and it was by waiting upon my ‘bos‘ that I got my first knowledge of actors; for as there was no scene-painters then in the country, and he having some little skill, (little enough to be sure,) of that kind of work, he was employed for want of a better; and I ground the paints, and mixed them, as he taught me. So, by and by, as I could draw rather better than bos, I became a favourite with the actors.”

“That drawing over the fire-place, I understand, is one of yours.”

“Yes, miss; but I can’t see the end of a camels-hair pencil now.”

“How long is it since you practised scene-painting?”

“This was in the year seventeen hundred and seventy four, at which time Mr. Hallam went to England. Mr. Henry was the great man of the theatre then, and a fine man he was. When I left New-York, to go to Canada, there were four sisters in the old American Company, the oldest was Mrs. Henry; and when I came back, after the war, the youngest was Mrs. Henry, and the other two had been Mrs. Henrys in the meanwhile, and were still living. This was a long time ago. Things have mended.”

Later in the book, we learn some more of Kent’s early life through another dialogue with Emma:

“I was born, as I have told you, Miss Emmy, in this city, when it was a poor little place compared to what it is now; when the park, now level as a floor, and filled with trees, was called the fields ; no houses, but some mean wooden ones, around it; and neither tree nor green thing to be seen. The people were almost as much Dutch as English. My master took me with him to Canada, when the rebels, as they called them then, were mobbing the tories—for he was an Englishman and a loyalist.”

“He was a good master to you—was he not?”

“Why do you think so, Miss?”

“Because you had a good education for—for—”

“A slave, Miss. You did not like to speak the word. Yes, I was a slave. Yes, Miss, he was a good master; but he was a master.”

“He had you taught a trade, too.”

“That makes the slave a more valuable property. He can earn more wages for his master. Having a trade, he will bring a higher price if set up at auction, to be knocked down to the highest bidder, like a horse or a dog.”

It seems strange that a “memoir” would feature an omniscient narrator and a heroine; perhaps this tale is fictionalized to some extent. Still, the details of the theatre and the lives of its workers would have been based on the realities of the day. Whether John Kent was a real historical figure or not, the first prop masters of America would have had similar lives.

History of the US Flag

Happy Fourth of July to all my US readers! I made this handy guide for how the flag has appeared throughout the history of the United States, so if your play is set during a specific year and it calls for a flag, you can quickly see the number and layout of the stars needed.

Flags of the USA throughout history
Click for a larger size

The layout of the stars was officially standardized in 1912, while the colors were standardized in 1934. In the guide above, I put the most typical flag of the period first, with alternate patterns and special flags listed after. Starting in 1818, the new flags were introduced on July 4th of the year listed.

In 1942, the Federal Flag Code was passed to provide uniform guidelines for the display of flags. One frequent complaint from flagophiles about many movies is the incorrect positioning of a flag in the vertical position. According to the code, the blue part should be on the left.

vertical positioning of the US flag
vertical positioning of the US flag

For more about the code, check out this illustration of how to display the flag. This of course brings up the prop master’s dilemma; if it is a “common” mistake to display a hanging flag with the blue field on the right, then it is conceivable that the character in the play who hung the flag would have made the same mistake. In other words, dressing and decorating a set isn’t about doing what is correct, but rather what is truthful to the characters and world of the play. Just like a character may drink wine out of a coffee cup, so too may one wear a jacket made out of a flag. Here is a whole blog dedicated to finding incorrect displays of the American flag.

As an interesting side note, there is only place where an official flag is never brought to half-mast during a period of mourning. That place? The Moon.

The First Links of the Rest of Your Life

Happy July, everyone. And to my US readers, happy Fourth of July weekend. I’ll keep this brief as most of you are off work and school, or drifting away to vacation. Unless you’re in summer stock, in which case, you should be building props rather than reading my blog!

Here is an interesting story for those of you who make replica props: DC Comics Sues Gotham Garage Over Replica Batmobiles. Prop replicas live in a murky area of copyright and trademark law, and this lawsuit has a lot of specific factors (and it hasn’t been settled yet). It will be interesting to see how this plays out.

This past June, Dave Lowe celebrated the 30th anniversary of Raiders of the Lost Ark with thirty days of posts about the movie. In a post titled “The Temple of Dagobah“, we learn how the vines from Yoda’s planet in Star Wars ended up being reused for the temple Indiana Jones steals the golden idol from in the opening of Raiders.

Dream Now Reality: A filmmaker from Victoria wins a contest to make a movie from his script. His script is about a ten-year-old girl who builds a robot friend from old VCR parts. The filmmaker suddenly realizes he needs to build a robot. Luckily, he has Paxton Downard on his team, who built props for Stargate and Fringe. Man, I wish this article had photographs; still, it’s a cute story.

Finally, Make Magazine has an interesting editorial by Saul Griffith called “DIT: Raising Our Collective Barn“. He writes about the importance and benefits of collaboration when making things, and describes it as DIT—do it together—rather than DIY.

Making and finding props for theatre, film, and hobbies