hide screen via book to hide phone (Textbook Props)
A textbook-style prop can mask a phone-shaped object for a stage, display, or photo, but it should not hide an operating phone for use. Measure the object with its case on, make a removable pocket with modest clearance, and test it before finishing. Use a dummy for continuous display; keep any real phone powered off and uncharged.
A plain book cover can look at home on a desk or set, while a phone-shaped object may suit a scene that calls for one. The key is to build a prop, not a covert phone holder. Do not use it to get around classroom, exam, or workplace rules.
I treat this as a small fabrication job: measure first, make a test pocket, then build the shell. That order helps prevent a tight fit or a loose object from spoiling the result. The measurements below are practical design choices, not official safety standards.
Planning the Textbook Prop
This stage sets the prop’s purpose and limits before any cutting or gluing. Decide whether it is for a display, stage, or photo, and choose a dummy phone or other phone-shaped object. A real phone should be powered off, not charged, and not operated inside the finished prop.
Begin by writing down what the prop needs to do: look like a book from the angles people will see, hold the object in place, and allow removal without force. It does not need to work as a phone case or as a real book. Do not cut into a textbook or a book you need to use.
A handheld prop does not have a building-code specification for its pocket size. Still, materials and adhesives have their own handling and fire-safety instructions. Follow the supplier’s directions, especially if the prop will be used near stage lights or other heat sources. If it is for a public setting, check the venue’s rules.
Plan around these limits:
- Use 3 mm bookboard for the covers and spine. This is a practical choice for a non-load-bearing prop, not a required standard.
- Make the pocket removable if possible, so you can inspect it or swap the dummy.
- Use a nonconductive insert, such as suitable card or foam, and avoid metal parts near the object.
- Do not depend on glue, magnets, or friction as a rated restraint. No load rating is established for this prop.
Choose a viewing direction before building. Mark which side faces the audience or camera, and check whether the book needs to look convincing from the front only or from several angles. Next, measure the object that will actually go inside.
Measuring the Pocket and Access Clearances
Measure the dummy or powered-off phone with its case installed. Use those measurements rather than a generic phone size. The pocket needs enough room for easy insertion and removal, but too much space can let the object shift or fall out when the prop tilts.
Use a ruler or caliper to measure the object’s width, height, and thickness. Keep the object flat and measure the widest points, including any raised camera area or case edges. Record the measurements in millimetres. If the case may change, measure again with the case you plan to use.
Set the pocket’s internal size as follows:
| Pocket dimension | Measurement rule | Example if object measures |
|---|---|---|
| Width | Object width + 4 mm total | 74 mm becomes 78 mm |
| Height | Object height + 4 mm total | 150 mm becomes 154 mm |
| Depth | Object thickness + 2 mm | 12 mm becomes 14 mm |
The extra 4 mm in width and height gives 2 mm of clearance on each side. The extra 2 mm in depth is a starting allowance, not a promise of fit. Material thickness, seams, and the shape of the case can affect the finished space, so verify the pocket with a physical test piece before gluing.
Make a removable mock-up from scrap card or similar material. Cut it to the planned internal dimensions, assemble it without permanent adhesive, and test the object. It should slide in and out without pressure on the buttons, camera area, or screen. If it catches, find the tight spot and adjust the mock-up before building the shell.
Also test the object’s path in and out. A pocket that fits when open may be awkward if the book cover blocks access. Mark the opening and the screen-facing side on the mock-up. When those checks are complete, use the mock-up as a guide for the shell.
Building and Finishing the Shell
The shell gives the prop its book-like shape, while the pocket holds the dummy or powered-off object. Build the covers and spine from 3 mm bookboard, then fit the tested pocket inside. Keep the construction simple and check each piece before using permanent adhesive.
- Cut the covers and spine. Size them to suit the look and object, leaving room for the pocket and its walls. The bookboard is a fabrication choice, not a structural rating.
- Assemble the outer shape. Join the covers and spine with a suitable hinge material or a method that allows the book to open. Follow the material supplier’s directions for adhesive use and drying.
- Fit the pocket. Use the measured mock-up as a template. Keep the pocket removable where practical, and avoid placing hard or conductive parts against the object.
- Check access. Open and close the shell. Confirm that the object can be removed without bending the cover or pushing on the screen, camera, or buttons.
- Apply the finish. Cover the shell with paper or fabric suitable for the prop. Let adhesives dry as directed before inserting the dummy.
A book prop does not need to look identical to a specific textbook to read as a book from the chosen viewing angle. A plain cover and spine can be enough for a stage or photo. Avoid adding a cover detail that blocks the opening or makes the object harder to remove.
Do not build in charging access, a recording opening, or a plan to operate a phone inside. A close-fitting enclosure can hold heat around a powered phone. There is no defensible universal airflow or CFM figure for an unspecified phone, case, and enclosure, so ventilation holes are not a basis for safe operation. Use a dummy for a continuous display.
Fit, Retention, and Safety Verification
A finished prop should hold its dummy during ordinary handling and allow deliberate removal without force. Test it with the actual object and finish in place. This check is not a rated restraint test, so do not treat the prop as suitable for impact, rough handling, or use where a falling object could hurt someone.
Use this verification sequence:
- Check the fit: Insert and remove the object several times. It should not press on buttons, cameras, or the screen.
- Check retention: Close the prop, hold it over a clear surface, and tilt it slowly in different directions. The object should not slide out. If it does, revise the pocket; do not assume glue, magnets, or friction make it secure.
- Check the shell: Look for loose edges, sharp corners, or adhesive that has not cured. Repair the prop before use.
- Check the device state: Use a dummy for display. If a real phone is used only to check size, confirm it is powered off and remove it after the fit check. Do not charge, record with, or leave an operating phone inside.
- Check the setting: Follow venue rules and the material supplier’s fire-safety instructions. Keep the prop away from heat sources unless the materials are approved for that use.
A phone getting dim, swelling, or shutting down is not a safety control. If any of those signs appear, remove it from the enclosure and stop using it. For continuous display, replace the phone with a dummy rather than trying to improve airflow or relying on automatic shutdown.
Illustrative build scenarios
These examples show how the measurements guide choices; they are not documented client cases or proof of performance.
- Desk display: A maker measures a dummy with its case installed, builds a removable pocket, and tests it while the cover is open and closed. The prop is used for display only.
- Stage scene: A crew checks the planned viewing angles, then uses a dummy for repeated scenes. The shell and finish are checked against the venue’s material rules.
- Photo prop: A photographer tests the book from the camera’s intended angle, then confirms the dummy stays in place when the prop is repositioned. No operating phone is needed.
In each case, the next step is the same: inspect the fit and the setting before use, and choose a dummy if the prop will remain assembled for a long time.
Conclusion
A convincing textbook-style shell starts with a clear purpose, accurate measurements, and a removable pocket test. Add 4 mm to the object’s width and height, and 2 mm to its thickness as a starting allowance. Use the prop for a dummy or powered-off object only; do not use it to conceal active phone use or bypass rules.
Frequently Asked Questions
These answers cover common questions about sizing, materials, use, and safety. The measurements are practical fabrication guidance, not certified tolerances or a promise that every phone case will fit. Test the actual object and finished pocket, and follow the rules for the place where you plan to use the prop.
Can I use a real phone inside the prop?
Only use a real phone for a brief fit check while it is powered off. Remove it afterward. Do not operate, charge, record with, or leave it running inside the enclosure.
How much clearance should the pocket have?
Add 4 mm total to the measured width and height, giving 2 mm per side. Add 2 mm to the measured thickness. Test a removable mock-up before gluing.
Should I measure the phone with its case on?
Yes. Measure the exact object as it will sit in the pocket, including its installed case and any raised parts.
Can I cut a pocket into a textbook?
This guide is for a fabricated prop shell, not for cutting into a textbook. Build a separate shell from bookboard and a removable pocket.
Can I charge a phone inside the book prop?
No. Do not charge a phone inside it. A close-fitting enclosure can trap heat, and there is no universal airflow figure that makes an unspecified setup safe.
Will screen dimming or shutdown protect the phone?
No. Dimming, swelling, or shutdown are not reliable safety controls. Remove the phone if any change occurs and use a dummy for continuous display.
Can magnets or glue keep the object from falling out?
Do not treat magnets, glue, or friction as a rated restraint. Test the pocket with a dummy over a clear surface, and revise it if the object shifts or slips.
What material should I use for the covers?
Three-millimetre bookboard is a practical choice for non-load-bearing covers and spine. It is not a code requirement or a structural rating. Follow supplier instructions for all materials and adhesives.
(This article was written by one of our staff writers, Samuel Thornton. Visit our Meet the Team page.)
